BY-LAWS

of

W. R. GRACE & CO.

Incorporated under the Laws of the State of Delaware

ARTICLE I

OFFICES AND RECORDS

Section 1.1. Delaware Office. The principal office of the Corporation in the State of Delaware shall be located in Wilmington, Delaware, and the name and address of its registered agent is The Prentice-Hall Corporation System, Inc., 2711 Centerville Road, Suite 400, Wilmington, Delaware.

Section 1.2. Other Offices. The Corporation may have such other offices, either within or without the State of Delaware, as the Board of Directors may designate or as the business of the Corporation may from time to time require.

Section 1.3. Books and Records. The books and records of the Corporation may be kept outside the State of Delaware at such place or places as may from time to time be designated by the Board of Directors.

ARTICLE II

STOCKHOLDERS

Section 2.1. Annual Meeting. The annual meeting of the stockholders of the Corporation shall be held annually (a) on the fifth day of May, or (b) if such day be a Saturday, Sunday or a holiday at the place where the meeting is to be held, on the last business day preceding or on the first business day after such fifth day of May, as may be fixed by the Board of Directors, or (c) on such other date as may be fixed by the Board of Directors.

Section 2.2. Special Meeting. Subject to the rights of the holders of any series of stock having a preference over the Common Stock of the Corporation as to dividends or upon liquidation ( "Preferred Stock" ) with respect to such series of Preferred Stock, special meetings of the stockholders may be called only by the Chairman, by the President or by the Board of Directors pursuant to a resolution adopted by a majority of the total number of directors which the Corporation would have if there were no vacancies (the "Whole Board" ).

Section 2.3. Place of Meeting. The Chairman, the President or the Board of Directors, as the case may be, may designate the place of meeting for any annual meeting or for any special meeting of the stockholders called by the Chairman, the President or the Board of Directors. If no designation is so made, the place of meeting shall be the principal office of the Corporation.

Section 2.4. Notice of Meeting. Written or printed notice, stating the place, date and time of the meeting and the purpose or purposes for which the meeting is called, shall be delivered by

the Corporation not less than ten (10) days nor more than sixty (60) days before the date of the meeting, either personally or by mail (including email or other electronic delivery), to each stockholder of record entitled to vote at such meeting. If mailed, such notice shall be deemed to be delivered when deposited in the U.S. mail with postage thereon prepaid, addressed to the stockholder at his address as it appears on the stock transfer books of the Corporation. Such further notice shall be given as may be required by law. Only such business shall be conducted at a special meeting of stockholders as shall have been brought before the meeting pursuant to the Corporation's notice of meeting. Meetings may be held without notice if all stockholders entitled to vote are present, or if notice is waived by those not present in accordance with Section 6.4 of these By-laws. Any previously scheduled meeting of the stockholders may be postponed, and (unless the Certificate of Incorporation otherwise provides) any special meeting of the stockholders may be cancelled, by resolution of the Board of Directors upon public notice given prior to the date previously scheduled for such meeting of stockholders.

Section 2.5. Quorum and Adjournment. Except as otherwise provided by law or by the Certificate of Incorporation, the holders of a majority of the outstanding shares of the Corporation entitled to vote generally in the election of directors (the "Voting Stock" ), represented in person or by proxy, shall constitute a quorum at a meeting of stockholders, except that when specified business is to be voted on by a class or series of stock voting as a class, the holders of a majority of the voting power of the shares of such class or series shall constitute a quorum of such class or series for the transaction of such business. The chairman of the meeting or a majority of the shares so represented may adjourn the meeting from time to time, whether or not there is a quorum. No notice of the time and place of adjourned meetings need be given except as required by law. The stockholders present at a duly called meeting at which a quorum is present may continue to transact business until adjournment, notwithstanding the withdrawal of enough stockholders to leave less than a quorum.

Section 2.6. Proxies. At all meetings of stockholders, a stockholder may vote by proxy executed in writing (or in any other manner permitted by law) by the stockholder, or by his duly authorized attorney-in-fact.

Section 2.7. Notice of Stockholder Business and Nominations.

(A)      Annual Meetings of Stockholders .

(1)      Nominations of persons for election to the Board of Directors of the Corporation and the proposal of other business to be considered by the stockholders may be made at an annual meeting of stockholders (a) pursuant to the Corporation's notice of meeting; (b) by or at the direction of the Board of Directors; or (c) by any stockholder of the Corporation who was a stockholder of record at the time of giving of the notice provided for in this Section 2.7 and at the time of the annual meeting, who is entitled to vote at the meeting and who complies with the notice procedures set forth in this Section 2.7 as to such nomination or business. Clause (c) of the preceding sentence shall be the exclusive means for a stockholder to make nominations or propose other business to be considered at an annual meeting of stockholders (other than matters properly brought under Rule 14a-8 under the Securities Exchange Act of 1934, as amended (the "Exchange Act") and included in the Corporation's notice of meeting).

(2)      No nominations or any other business shall be deemed properly brought before an annual meeting by a stockholder pursuant to clause (c) of the first sentence of paragraph (A)(1) of this Section 2.7, unless the stockholder shall have given timely notice thereof in writing to

the Secretary of the Corporation, and such other business is otherwise a proper matter for stockholder action. To be timely, a stockholder's notice shall be delivered to the Secretary at the principal executive offices of the Corporation not earlier than the close of business on the 120th day prior to, and not later than the close of business on the 90th day prior to, the first anniversary of the preceding year's annual meeting. Notwithstanding the foregoing, if (a) the date of the annual meeting is more than 30 days before or more than 60 days after such anniversary date or (b) no annual meeting was held during the preceding year, then notice by the stockholder to be timely must be so delivered not earlier than the close of business on the 120th day prior to the date of such annual meeting and not later than the close of business on the later of (i) the 90th day prior to the date of such annual meeting or (ii) if the first public announcement of the date of such annual meeting is less than 100 days prior to the date of such annual meeting, on the 10th day following the day on which public announcement of the date of such meeting is first made by the Corporation. In no event shall any adjournment or postponement of an annual meeting, or the public announcement thereof, commence a new time period for the giving of a stockholder's notice as described above. To be in proper form, a stockholder's notice (whether given pursuant to this paragraph (A)(2) or paragraph (B) of this Section 2.7) to the Secretary must: (a) set forth, as to the stockholder giving the notice and the beneficial owner, if any, on whose behalf the nomination or proposal is made, (i) the name and address of such stockholder, as they appear on the Corporation's books, and of such beneficial owner, if any, (ii) (A) the class or series and number of shares of the Corporation that are, directly or indirectly, owned beneficially and of record by such stockholder and such beneficial owner; (B) any option, warrant, convertible security, stock appreciation right, or similar right with an exercise or conversion privilege or a settlement payment or mechanism at a price related to any class or series of shares of the Corporation or with a value derived in whole or in part from the value of any class or series of shares of the Corporation, whether or not such instrument or right shall be subject to settlement in the underlying class or series of capital stock of the Corporation or otherwise (a "Derivative Instrument") directly or indirectly owned beneficially by such stockholder and any other direct or indirect opportunity to profit or share in any profit derived from any increase or decrease in the value of shares of the Corporation; (C) any proxy, contract, arrangement, understanding, or relationship pursuant to which such stockholder has a right to vote any shares of any security of the Corporation; (D) any short interest in any security of the Corporation (for purposes of this Section 2.7, a person shall be deemed to have a short interest in a security if such person directly or indirectly, through any contract, arrangement, understanding, relationship or otherwise, has the opportunity to profit or share in any profit derived from any decrease in the value of such security); (E) any rights to dividends on the shares of the Corporation owned beneficially by such stockholder that are separated or separable from the underlying shares of the Corporation; (F) any interest in shares of the Corporation or Derivative Instruments held, directly or indirectly, by a general or limited partnership in which such stockholder is a general partner or, directly or indirectly, beneficially owns an interest in a general partner; and (G) any performance-related fees (other than an asset-based fee) that such stockholder is entitled to based on any increase or decrease in the value of shares of the Corporation or Derivative Instruments, as of the date of such notice, including without limitation any interests in such fees held by members of such stockholder's immediate family sharing the same household (which information shall be supplemented by such stockholder and beneficial owner, if any, not later than 10 days after the record date for the meeting to disclose such ownership as of the record date), and (iii) any other information relating to such stockholder and beneficial owner, that would be required to be disclosed in a proxy statement or other filings required to be made in connection with solicitations of proxies for, as applicable, the proposal and/or for the election of directors in a contested election pursuant to Section 14 of the Exchange Act and the rules and regulations promulgated thereunder; (b) set forth, if the notice relates to any business other than a nomination

of a director or directors that the stockholder proposes to bring before the meeting (i) a brief description of the business desired to be brought before the meeting, the reasons for conducting such business at the meeting and any material interest of such stockholder and beneficial owner, in such business and (ii) a description of any agreements, arrangements and understandings between such stockholder and beneficial owner, and any other person or persons (including their names) in connection with the proposal of such business by such stockholder; (c) set forth, as to any person whom the stockholder proposes to nominate for election or reelection as a director (i) all information relating to such person that would be required to be disclosed in a proxy statement or other filings required to be made in connection with solicitations of proxies for election of directors in a contested election pursuant to Section 14 of the Exchange Act and the rules and regulations promulgated thereunder (including such person's written consent to being named in the proxy statement as a nominee and to serving as a director if elected) and (ii) a description of all direct and indirect compensation and other material monetary agreements, arrangements and understandings during the past three years, and any other material relationships, between or among such stockholder and beneficial owner, and such owner's affiliates and associates, or others acting in concert with any such affiliates and associates, on the one hand, and each proposed nominee, and his or her affiliates and associates, or others acting in concert with any such affiliates and associates, on the other hand, including without limitation all information that would be required to be disclosed pursuant to Rule 404 promulgated under Regulation S-K if the stockholder making the nomination or any beneficial owner on whose behalf the nomination is made, or any affiliate or associate of either thereof, or person acting in concert with either thereof, were the "registrant" for purposes of such rule and the nominee were a director or executive officer of such registrant; and (d) with respect to each nominee for election to the Board of Directors, include a completed and signed questionnaire, representation and agreement as required by paragraph (D) of this Section 2.7. The Corporation may require any proposed nominee to furnish such other information as may reasonably be required by the Corporation to determine the eligibility of such proposed nominee to serve as an independent director of the Corporation or that could be material to a reasonable stockholder's understanding of the independence, or lack thereof, of such nominee.

(3)      Notwithstanding anything in the second sentence of paragraph (A)(2) of this Section 2.7 to the contrary, in the event that (1) the number of directors to be elected to the Board of Directors of the Corporation is increased and there is no public announcement by the Corporation naming all of the nominees for election as director or specifying the size of the increased Board of Directors at least 100 days prior to the first anniversary of the preceding year's annual meeting or (2) no annual meeting was held during the preceding year, then a stockholder's notice required by this Section 2.7 shall be considered timely, but only with respect to nominees for any new positions created by such increase, if it shall be delivered to the Secretary at the principal executive offices of the Corporation not later than the close of business on the 10th day following the day on which such public announcement is first made by the Corporation.

(B)      Special Meetings of Stockholders . Only such business shall be conducted at a special meeting of stockholders as shall have been brought before the meeting pursuant to the Corporation's notice of meeting. Nominations of persons for election to the Board of Directors may be made at a special meeting of stockholders at which directors are to be elected pursuant to the Corporation's notice of meeting as follows: (1) by or at the direction of the Board of Directors; or (2) provided that the Board of Directors has determined that directors shall be elected at such meeting, by any stockholder of the Corporation who (a) is a stockholder of record at the time of giving of notice provided for in this Section 2.7, (b) is a stockholder of record at the time of the special meeting, (c) is entitled to vote at the special meeting, and (d) has complied with the notice procedures set forth

in this paragraph (B) as to such nomination. If the Corporation calls a special meeting of stockholders for the purpose of electing one or more directors to the Board of Directors, only a stockholder who meets all four requirements under clause (2) of the second sentence of this paragraph (B) (a "Qualifying Stockholder") may nominate a person or persons (as the case may be), for election to such position(s) as specified in the Corporation's notice of meeting, so long as the Qualifying Stockholder's notice required by paragraph (A)(2) of this Section 2.7 with respect to any nomination (including the completed and signed questionnaire, representation and agreement required by paragraph (D) of this Section 2.7) shall be delivered to the Secretary at the principal executive offices of the Corporation not earlier than the close of business on the 120th day prior to the date of such special meeting and not later than the close of business on the later of the 90th day prior to the date of such special meeting or, if the first public announcement of the date of such special meeting is less than 100 days prior to the date of the special meeting, the 10th day following the day on which public announcement is first made of the date of the special meeting and of the nominees proposed by the Board of Directors to be elected at such meeting. In no event shall any adjournment or postponement of a special meeting, or the public announcement of an adjournment thereof, commence a new time period for the giving of a Qualifying Stockholder's notice as described above.

(C)      General .

(1)      Only such persons who are nominated in accordance with the procedures set forth in this Section 2.7 may be elected and shall be eligible to serve as directors; and only such business shall be conducted at a meeting of stockholders as shall have been brought before the meeting in accordance with the procedures set forth in this Section 2.7. Except as otherwise provided by law, the Certificate of Incorporation or these By-laws, the chairman of the meeting shall have the power and duty to determine whether a nomination or any business proposed to be brought before the meeting was made or proposed, as the case may be, in accordance with the procedures set forth in this Section 2.7 and, if any proposed nomination or business is not in compliance with this Section 2.7, to declare that such defective proposal or nomination shall not be acted upon.

(2)      For purposes of this Section 2.7, "public announcement" shall mean disclosure in a press release reported by the Dow Jones News Service, Associated Press or a comparable national news service or in a document publicly filed by the Corporation with the Securities and Exchange Commission pursuant to Section 13, 14 or 15(d) of the Exchange Act and the rules and regulations promulgated thereunder.

(3)      In addition to the foregoing provisions of this Section 2.7, a stockholder shall also comply with all applicable requirements of the Exchange Act and the rules and regulations thereunder with respect to the matters set forth in this Section 2.7. Any references in these By-laws to the Exchange Act or the rules promulgated thereunder are not intended to and shall not limit the requirements applicable to nominations or proposals as to any other business to be considered pursuant to paragraph (A)(1)(c) or paragraph B of this Section 2.7. Nothing in this Section 2.7 shall be deemed to affect any rights (a) of stockholders to request inclusion of proposals in the Corporation's proxy statement pursuant to Rule 14a-8 under the Exchange Act;or (b) of the holders of any series of Preferred Stock if and to the extent provided for under law, the Certificate of Incorporation, or these By-laws.

(D)      Submission of Questionnaire, Representation, and Agreement . To be eligible to be a nominee for election or reelection as a director of the Corporation, a person must deliver (in accordance with the time periods prescribed for delivery of notice under this Section 2.7) to the

Secretary at the principal executive offices of the Corporation a written questionnaire with respect to the background and qualification of such person and the background of any other person or entity making the nomination or on whose behalf the nomination is being made (which questionnaire shall be provided by the Secretary upon written request) and a written representation and agreement (in the form provided by the Secretary upon written request) that such person: (1) is not and will not become a party to (a) any agreement, arrangement or understanding with, and has not given any commitment or assurance to, any person or entity as to how such person, if elected as a director of the Corporation, will act or vote on any issue or question (a "Voting Commitment") that has not been disclosed therein or (b) any Voting Commitment that could limit or interfere with such person's ability to comply, if elected as a director of the Corporation, with such person's fiduciary duties under applicable law; (2) is not and will not become a party to any agreement, arrangement or understanding with any person or entity other than the Corporation with respect to any direct or indirect compensation, reimbursement or indemnification in connection with service or action as a director that has not been disclosed therein; (3) if the Board of Directors so requires, agrees to purchase within 90 days if elected as a director of the Corporation, a specified number of common shares of the Corporation ("Qualifying Shares") (subject to adjustment for any stock splits or stock dividends occurring after the date of such representation or agreement), will not dispose of such minimum number of shares so long as such person is a director, and has disclosed therein whether all or any portion of the Qualifying Shares were or will be purchased with any financial assistance provided by any other person, whether any other person has or will have any interest in the Qualifying Shares and, in each case, the name and address of such person; and (4) in such person's individual capacity and on behalf of any person or entity making the nomination or on whose behalf the nomination is being made, would be in compliance, if elected as a director of the Corporation, and will comply with all applicable publicly disclosed corporate governance, conflict of interest, confidentiality and stock ownership and trading policies and guidelines of the Corporation.

Section 2.8.      Procedure for Election of Directors; Required Vote. Election of directors at all meetings of the stockholders at which directors are to be elected shall be by ballot, and, except as otherwise provided by law, the Certificate of Incorporation, or these By-laws, and subject to the rights of the holders of any series of Preferred Stock to elect directors under specified circumstances, each director shall be elected by the vote of the majority of the votes cast with respect to the director; provided that if the number of nominees exceeds the number of directors to be elected, a plurality of the votes cast thereat shall elect directors. For purposes of this section, “a majority of the votes cast” means that the number of shares voted “FOR” a director must exceed the number of shares voted “AGAINST” that director. If a director is not elected, the director shall offer to resign from the Board of Directors. The Nominating and Corporate Governance Committee of the Board of Directors shall make a recommendation to the Board of Directors on whether to accept or reject the resignation, or whether other action should be taken. The Board of Directors shall consider and act on the Committee’s recommendation and publicly disclose its decision and the rationale behind it within 90 days from the date of the certification of the election results. The director who offers his or her resignation shall not participate in the Nominating and Corporate Governance Committee’s or the Board of Directors’ decision. Except as otherwise provided by law, the Certificate of Incorporation, or these By-laws, in all matters other than the election of directors, the affirmative vote of a majority of the shares present in person or represented by proxy at the meeting and entitled to vote on the matter shall be the act of the stockholders.

Section 2.9.      Inspectors of Elections; Opening and Closing the Polls. The Board of Directors by resolution shall appoint one or more inspectors, which inspector or inspectors may include individuals who serve the Corporation in other capacities, including, without limitation, as officers,

employees, agents or representatives, to act at meetings of stockholders and make written reports thereof. One or more persons may be designated as alternate inspectors to replace any inspector who fails to act. If no inspector or alternate has been appointed to act or is able to act at a meeting of stockholders, the chairman of the meeting shall appoint one or more inspectors to act at the meeting. Each inspector, before discharging his or her duties, shall take and sign an oath faithfully to execute the duties of inspector with strict impartiality and according to the best of his or her ability. The inspectors shall have the duties prescribed by law.

The chairman of the meeting shall fix and announce at the meeting the date and time of the opening and the closing of the polls for each matter upon which the stockholders will vote at a meeting.

ARTICLE III

BOARD OF DIRECTORS

Section 3.1.      General Powers. The business and affairs of the Corporation shall be managed under the direction of the Board of Directors. In addition to the powers and authorities by these By-laws expressly conferred upon them, the Board of Directors may exercise all such powers of the Corporation and do all such lawful acts and things as are not by statute or by the Certificate of Incorporation or by these By-laws required to be exercised or done by the stockholders. The Board of Directors may choose one of its members to be Chairman, and shall fill any vacancy in the position of Chairman at such time and in such manner as the Board of Directors shall determine. The Chairman shall preside at all meetings of the Board of Directors and of stockholders. The Chairman shall not be an officer of the Corporation unless the Board of Directors shall elect him an officer pursuant to Section 4.1 of these By-laws.

Section 3.2.      Number, Tenure and Qualifications. Subject to the rights of the holders of any series of Preferred Stock to elect directors under specified circumstances, the number of directors shall be fixed from time to time exclusively pursuant to a resolution adopted by a majority of the Whole Board. The directors, other than those who may be elected by the holders of any series of Preferred Stock under specified circumstances, shall be divided, with respect to the time for which they severally hold office, into three classes, as nearly equal in number as is reasonably possible, designated Class I, Class II and Class III, with the term of office of the Class I directors to expire at the 2015 annual meet-ing of stockholders, the term of office of the Class II directors to expire at the 2016 annual meeting of stockholders and the term of office of the Class III directors to expire at the 2017 annual meeting of stockholders, with each director to hold office until his or her successor shall have been duly elected and qualified. At each annual meeting of stockholders, commencing with the 2015 annual meeting, directors elected to succeed those directors whose terms then expire shall be elected for a term of office to expire at the third succeeding annual meeting of stockholders after their election, with each director to hold office until his or her successor shall have been duly elected and qualified or until such director’s earlier resignation or removal.

Section 3.3.      Regular Meetings. A regular meeting of the Board of Directors shall be held without other notice than this Section 3.3 immediately after, and at the same place as, the Annual Meeting of Stockholders. The Board of Directors may fix the time and place for the holding of additional regular meetings without notice.

Section 3.4.      Special Meetings. Special meetings of the Board of Directors shall be called at the request of the Chairman, the President or a majority of the directors then in office. The

person or persons authorized to call special meetings of the Board of Directors may fix the place and time of such meetings.

Section 3.5.      Notice. Notice of any special meeting or notice of a change in the time or place of any regular meeting of the Board of Directors shall be given to each director at his or her business or residence in writing by hand delivery, first-class or overnight mail or courier service, facsimile transmission, email or other electronic delivery, or orally (in person or by telephone). If mailed by first-class mail, such notice shall be deemed adequately delivered when deposited in the U.S. mail so addressed, with postage thereon prepaid, at least five (5) days before such meeting. If by overnight mail or courier service, such notice shall be deemed adequately delivered when the notice is delivered to the overnight mail or courier service company at least twenty-four (24) hours before such meeting. If by facsimile transmission, email or other electronic delivery, such notice shall be deemed adequately delivered when the notice is transmitted least twelve (12) hours before such meeting. If given orally, the notice shall be communicated to the director or his or her representative or to the answering machine of the director or representative. If given orally or by hand delivery, the notice shall be given at least twenty-four (24) hours prior to the time set for the meeting. Neither the business to be transacted at, nor the purpose of, any regular or special meeting of the Board of Directors need be specified in the notice of such meeting, except for amendments to these By-laws, as provided under Section 8.1. A meeting may be held at any time without notice if all the directors are present or if those not present waive notice of the meeting in accordance with Section 6.4 of these By-laws.

Section 3.6.      Action by Consent of Board of Directors. Any action required or permitted to be taken at any meeting of the Board of Directors or of any committee thereof may be taken without a meeting if all members of the Board of Directors or committee, as the case may be, consent thereto in writing, and the writing or writings are filed with the minutes of proceedings of the Board of Directors or committee.

Section 3.7.      Conference Telephone Meetings. Members of the Board of Directors, or any committee thereof, may participate in a meeting of the Board of Directors or such committee by means of conference telephone or similar communications equipment by means of which all persons participating in the meeting can hear each other, and such participation in a meeting shall constitute presence in person at such meeting.

Section 3.8.      Quorum. Subject to Section 3.9, a number of directors equal to at least a majority of the Whole Board shall constitute a quorum for the transaction of business. If at any meeting of the Board of Directors there shall be less than a quorum present, a majority of the directors present may adjourn the meeting from time to time without further notice. The act of the majority of the directors present at a meeting at which a quorum is present shall be the act of the Board of Directors. The directors present at a duly organized meeting may continue to transact business until adjournment, notwithstanding the withdrawal of enough directors to leave less than a quorum.

Section 3.9.      Vacancies. Subject to applicable law and the rights of the holders of any series of Preferred Stock with respect to such series of Preferred Stock, and unless the Board of Directors otherwise determines, vacancies resulting from death, resignation, retirement, disqualification, removal from office or other cause, and newly created directorships resulting from any increase in the authorized number of directors, may be filled only by the affirmative vote of a majority of the remaining directors, though less than a quorum of the Board of Directors, and directors so chosen shall hold office for a term expiring at the annual meeting of stockholders at which the term of office

of the class to which they have been elected expires and until such director's successor shall have been duly elected and qualified. No decrease in the number of authorized directors constituting the Whole Board shall shorten the term of any incumbent director.

Section 3.10.      Committees. The Board of Directors may establish one or more committees. Each committee shall consist of two or more directors of the Corporation designated by the Board of Directors. The Board of Directors may designate one or more directors as alternate members of any committee, who may replace any absent or disqualified member at any meeting of the committee. Any such committee may to the extent permitted by law exercise such powers and shall have such responsibilities as shall be specified in the designating resolution. In the absence or disqualification of any member of such committee or committees, the member or members thereof present at any meeting and not disqualified from voting, whether or not constituting a quorum, may unanimously appoint another member of the Board of Directors to act at the meeting in the place of any such absent or disqualified member. Each committee shall keep written minutes of its proceedings and shall report such proceedings to the Board of Directors when requested.

A majority of any committee may determine its action and fix the time and place of its meetings, unless the Board of Directors shall otherwise provide. Notice of such meetings shall be given to each member of the committee in the manner provided for in Section 3.5 of these By-laws. The Board of Directors shall have the power at any time to fill vacancies in, to change the membership of, or to dissolve any such committee. Nothing herein shall be deemed to prevent the Board of Directors from appointing one or more committees consisting in whole or in part of persons who are not directors of the Corporation; provided, however, that no such committee shall have or may exercise any authority of the Board of Directors.

The term of office of a committee member shall be as provided in the resolution of the Board designating him or her but shall not exceed his or her term as a director. If prior to the end of his or her term, a committee member should cease to be a director, he or she shall cease to be a committee member. Any member of a committee may resign at any time by giving written notice to the Board of Directors, the Chairman, the President or the Secretary. Such resignation shall take effect as pro-vided in Section 6.6 of these By-laws in the case of resignations by directors. Any member of a committee may be removed from such committee, either with or without cause, at any time, by resolution adopted by a majority of the Whole Board. Any vacancy in a committee shall be filled by the Board of Directors in the manner prescribed by these By-laws for the original designation of the members of such committee.

Section 3.11. Removal. Subject to the rights of the holders of any series of Preferred Stock with respect to such series of Preferred Stock, any director, or the entire Board of Directors, may be removed from office at any time by the stockholders, but only for cause.

Section 3.12. Records. The Board of Directors shall cause to be kept a record containing the minutes of the proceedings of the meetings of the Board of Directors and of the stockholders, appropriate stock books and registers and such books of records and accounts as may be necessary for the proper conduct of the business of the Corporation.

ARTICLE IV

OFFICERS

Section 4.1.      Elected Officers. The elected officers of the Corporation shall be a President, a Secretary, a Treasurer, and such other officers (including, without limitation, a Chairman and a Chief Financial Officer) as the Board of Directors may deem proper from time to time. If the Board of Directors elects a Chairman as an officer, the Chairman shall be chosen from among the directors. Each officer elected by the Board of Directors shall have such powers and duties as generally pertain to his or her respective office, subject to the specific provisions of this ARTICLE IV. Such officers shall also have such powers and duties as may be conferred from time to time by the Board of Directors. The Board of Directors may from time to time elect, or the Chairman (if an elected officer) or President may appoint, such assistant officers (including one or more Assistant Vice Presidents, Assistant Secretaries, Assistant Treasurers and Assistant Controllers) as may be necessary or desirable for the conduct of the business of the Corporation. Such assistant officers shall have such duties and shall hold their offices for such terms as shall be provided in these By-laws or as may be prescribed by the Board of Directors or by the Chairman (if an elected officer) or President, as the case may be.

Section 4.2.      Election and Term of Office. The elected officers of the Corporation shall be elected annually by the Board of Directors at the regular meeting of the Board of Directors held after the annual meeting of the stockholders or at any other time as the Board of Directors may deem proper. Each officer shall hold office until his successor shall have been duly elected and shall have qualified or until his or her death or until he or she shall resign, but any officer may be removed from office at any time by the affirmative vote of a majority of the Whole Board or, except in the case of an officer elected by the Board of Directors, by the Chairman (if an elected officer) or President. Such removal shall be without prejudice to the contractual rights, if any, of the person so removed.

Section 4.3.      Chairman. The Chairman shall preside at all meetings of the stockholders and of the Board of Directors and may be designated as the Chief Executive Officer of the Corporation. If elected as Chief Executive Officer, the Chairman shall be responsible for the general management of the affairs of the Corporation and shall perform all duties incidental to his or her office which may be required by law and all such other duties as are properly required of him or her by the Board of Directors. In such capacity, he or she shall make reports to the Board of Directors and the stockholders, and shall see that all orders and resolutions of the Board of Directors and of any committee thereof are carried into effect. The Chairman may also serve as President, if so elected by the Board of Directors.

Section 4.4.      President. The President may be designated as the Chief Executive Officer of the Corporation. If elected as Chief Executive Officer, the President shall be responsible for the general affairs of the Corporation and shall perform all duties incidental to a chief executive officer and all such other duties as may be required by law or as are properly required of him or her by the Board of Directors. In such capacity, he or she shall make reports to the Board of Directors and the stockholders, and shall see that all orders and resolutions of the Board of Directors and of any committee thereof are carried into effect. If the President is not elected as Chief Executive Officer, the President shall act in a general executive capacity and shall assist the Chief Executive Officer in the administration and operation of the Corporation's business and the general supervision of its policies and affairs. In the absence of or the inability to act of the Chairman, the President shall perform all duties of the Chairman and preside at all meetings of stockholders and of the Board of Directors.

Section 4.5.      Vice Presidents. Each Vice President shall have such powers and shall perform such duties as shall be assigned to him or her by the Board of Directors.

Section 4.6.      Chief Financial Officer. The Chief Financial Officer (if any) shall be a Vice President and act in an executive financial capacity. He or she shall assist the Chairman and the President in the general supervision of the Corporation's financial policies and affairs.

Section 4.7.      Treasurer. The Treasurer shall exercise general supervision over the receipt, custody and disbursement of corporate funds. The Treasurer shall cause the funds of the Corporation to be deposited in such banks as may be authorized by the Board of Directors, or in such banks as may be designated as depositaries in the manner provided by resolution of the Board of Directors. He or she shall have such further powers and duties and shall be subject to such directions as may be granted or imposed upon him or her from time to time by the Board of Directors, the Chairman or the President.

Section 4.8.      Secretary. The Secretary shall keep or cause to be kept in one or more books provided for that purpose, the minutes of all meetings of the Board of Directors, the committees of the Board of Directors and the stockholders; he or she shall see that all notices are duly given in accordance with the provisions of these By-laws and as required by law; he or she shall be custodian of the records and the seal of the Corporation and affix and attest the seal to all stock certificates of the Corporation (unless the seal of the Corporation on such certificates shall be a facsimile, as hereinafter provided) and affix and attest the seal to all other documents to be executed on behalf of the Corporation under its seal; and he or she shall see that the books, reports, statements, certificates and other documents and records required by law to be kept and filed are properly kept and filed; and in general, he or she shall perform all the duties incident to the office of Secretary and such other duties as from time to time may be assigned to him or her by the Board of Directors, the Chairman or the President.

Section 4.9.      Controller. The Controller shall have general control, charge and supervision of the accounts of the Corporation. He or she shall see that proper accounts are maintained and that all accounts are properly credited from time to time. He or she shall prepare or cause to be prepared the financial statements of the Corporation.

Section 4.10.      Removal. Any officer elected by the Board of Directors may be removed by the affirmative vote of a majority of the Whole Board whenever, in their judgment, the best interests of the Corporation would be served thereby. Any assistant officer appointed by the Chairman or the President may be removed by him or her whenever, in his or her judgment, the best interests of the Corporation would be served thereby. No elected officer shall have any contractual rights against the Corporation for compensation by virtue of such election beyond the date of the election of his or her successor, his or her death, his or her resignation or his or her removal, whichever event shall first occur, except as otherwise provided in an employment contract or under an employee deferred compensation plan.

Section 4.11. Vacancies. A newly created elected office and a vacancy in any elected office because of death, resignation, or removal may be filled by the Board of Directors for the unexpired portion of the term at any meeting of the Board of Directors.

ARTICLE V

STOCK CERTIFICATES, UNCERTIFICATED SHARES, AND TRANSFERS

Section 5.1.      Stock Certificates, Uncertificated Shares and Transfers.

(A)      The interest of each stockholder of the Corporation acquired on or prior to March 31, 2014 shall be evidenced by certificates for shares of stock in such form as the appropriate officers of the Corporation have prescribed until such certificates are surrendered. The interest of each stockholder of the Corporation acquired on or after April 1, 2014 shall be represented by uncertificated shares. On or after April 1, 2014, upon written request of any stockholder of the Corporation and surrender of the certificate(s) evidencing such holder's shares, the interest of such stockholder shall be represented by uncertificated shares. Except as otherwise expressly provided by law, the rights and obligations of the holders of uncertificated stock and the rights and obligations of the holders of certificates representing stock of the same class and series shall be identical.

(B)      Every holder of stock of the Corporation represented by certificates shall be entitled to have a certificate signed by, or in the name of the Corporation by the Chairman of the Board, the President or any Vice President and by the Treasurer or an Assistant Treasurer or the Secretary or an Assistant Secretary of the Corporation representing the number of shares registered in certificate form. Any or all of the signatures on the certificates (if any) representing the stock of the Corporation may be facsimile. In case any officer, transfer agent or registrar who has signed or whose facsimile signature has been placed upon a certificate has ceased to be such officer, transfer agent or registrar before such certificate is issued, it may be issued by the Corporation with the same effect as if such person were such officer, transfer agent or registrar at the date of issue.

(C)      The shares of the stock of the Corporation represented by certificates shall be transferred on the books of the Corporation by the holder thereof in person or by his or her attorney, upon surrender for cancellation of certificates for at least the same number of shares, with an assignment and power of transfer endorsed thereon or attached thereto, duly executed, with such proof of the authenticity of the signature as the Corporation or its agents may reasonably require. Upon receipt of proper transfer instructions from the registered owner of uncertificated shares, such uncertificated shares shall be canceled and issuance of new equivalent uncertificated shares or certificated shares (if authorized) shall be made to the person entitled thereto and the transaction shall be recorded upon the books of the Corporation.

(D)      Within a reasonable time after the issuance or transfer of uncertificated stock, the Corporation shall send to the registered owner thereof a written notice containing the information required to be set forth or stated on certificates pursuant to the General Corporation Law of the State of Delaware (the " GCL" ) or, unless otherwise provided by the GCL, a statement that the Corporation will furnish without charge to each stockholder who so requests the powers, designations, preferences and relative participating, optional or other special rights of each class of stock or series thereof and the qualifications, limitations or restrictions of such preferences and/or rights.

Section 5.2.      Lost, Stolen or Destroyed Certificates. No certificate for shares or uncertificated shares of stock in the Corporation shall be issued in place of any certificate alleged to have been lost, destroyed or stolen, except on production of such evidence of such loss, destruction or theft and on delivery to the Corporation of a bond of indemnity in such amount, upon such terms and secured by such surety, as the Board of Directors or any financial officer may in its or his or her discretion require.

ARTICLE VI

MISCELLANEOUS PROVISIONS

Section 6.1.      Fiscal Year. The fiscal year of the Corporation shall begin on the first day of January and end on the thirty-first day of December of each year.

Section 6.2.      Dividends. The Board of Directors may from time to time declare, and the Corporation may pay, dividends on its outstanding shares in the manner and upon the terms and conditions provided by law and the Certificate of Incorporation.

Section 6.3.      Seal. The corporate seal shall have inscribed thereon the words "Corporate Seal," the year of incorporation and around the margin thereof the words "W. R. Grace & Co."

Section 6.4.      Waiver of Notice. Whenever any notice is required to be given to any stockholder or director of the Corporation under the provisions of the GCL or these By-laws, a waiver thereof in writing, signed by the person or persons entitled to such notice, whether before or after the time stated therein, shall be deemed equivalent to the giving of such notice. The attendance of any stockholder at a meeting in person or by proxy, without protesting at the beginning of the meeting the lack of notice of such meeting, shall constitute a waiver of notice of such stockholder. Neither the business to be transacted at, nor the purpose of, any annual or special meeting of the stockholders or the Board of Directors or committee thereof need be specified in any waiver of notice of such meeting.

Section 6.5.      Audits. The accounts, books and records of the Corporation shall be audited upon the conclusion of each fiscal year by an independent registered public accountant selected by the Board of Directors, and it shall be the duty of the Board of Directors to cause such audit to be done annually.

Section 6.6.      Resignations. Any director or any officer or assistant officer, whether elected or appointed, may resign at any time by giving written notice of such resignation to the Chairman, the President, or the Secretary, and such resignation shall be deemed to be effective as of the close of business on the date said notice is received by the Chairman, the President, or the Secretary, or at such later time as is specified therein. No formal action shall be required of the Board of Directors or the stockholders to make any such resignation effective.

Section 6.7.      Indemnification and Insurance.

(A)      Each person who was or is made a party or is threatened to be made a party to or is otherwise involved (including involvement, without limitation, as a witness) in any actual or threatened action, suit or proceeding, whether civil, criminal, administrative or investigative (a " proceeding "), by reason of the fact that such person is or was a director or officer of the Corporation or, while a director or officer of the Corporation, is or was serving at the request of the Corporation as an employee or agent of the Corporation or as a director, officer, partner, member, trustee, administrator, employee or agent of another corporation or of a partnership, joint venture, limited liability company, trust or other enterprise, including service with respect to an employee benefit plan (an " indemnitee "), whether the basis of such proceeding is alleged action in an official capacity as a director or officer or in any other capacity while serving as a director or officer, shall be indemnified and held harmless by the Corporation to the fullest extent authorized by the GCL, as

the same exists or may hereafter be amended (but, in the case of any such amendment, only to the extent that such amendment permits the Corporation to provide broader indemnification rights than permitted prior thereto), against all expense, liability and loss (including attorneys' fees and related disbursements, judgments, fines, excise taxes or penalties under the Employee Retirement Income Security Act of 1974, as amended from time to time (" ERISA "), penalties and amounts paid or to be paid in settlement) reasonably incurred or suffered by such indemnitee in connection therewith and such indemnification shall continue as to an indemnitee who has ceased to be a director, officer, employee or agent and shall inure to the benefit of the indemnitee's heirs, executors and administrators; provided, however, that, except as provided in paragraph (B) of this Section 6.7 with respect to proceedings to enforce rights to indemnification, the Corporation shall indemnify any such indemnitee in connection with a proceeding (or part thereof) initiated by such indemnitee only if such proceeding (or part thereof) was authorized by the Board of Directors. The right to indemnification conferred in this paragraph (A) of this Section 6.7 shall be a contract right and shall include the obligation of the Corporation to pay the expenses incurred in defending any such proceeding in advance of its final disposition (an " advance of expenses "); provided, however, that an advance of expenses incurred by an indemnitee shall be made only upon delivery to the Corporation of an undertaking (an " undertaking "), by or on behalf of such indemnitee, to repay all amounts so advanced if it shall ultimately be determined by final judicial decision from which there is no further right to appeal (a " final adjudication ") that such indemnitee is not entitled to be indemnified for such expenses under this paragraph (A) of this Section 6.7 or otherwise.

(B)      Any indemnification of a director or officer of the Corporation or advance of expenses (including attorneys' fees, costs and charges) under paragraph (A) of this Section 6.7 shall be made promptly, and in any event within forty-five days (or, in the case of an advance of expenses, twenty days, provided that the director or officer has delivered the undertaking contemplated by paragraph (A) of this Section 6.7), upon the written request of the director or officer. If a determination by the Corporation that the director or officer is entitled to indemnification pursuant to this Section 6.7 is required, and the Corporation fails to respond within sixty days to a written request for indemnity, the Corporation shall be deemed to have approved the request.

(C)      To obtain indemnification under this Section 6.7, a claimant shall submit to the Corporation a written request, including therein or therewith such documentation and information as is reasonably available to the claimant and is reasonably necessary to determine whether and to what extent the claimant is entitled to indemnification. Upon written request by a claimant for indemnification pursuant to the first sentence of this paragraph (C), a determination, if required by applicable law, with respect to the claimant's entitlement thereto shall be made as follows: (1) if requested by the claimant, by Independent Counsel (as hereinafter defined), or (2) if no request is made by the claimant for a determination by Independent Counsel, (i) by the Board of Directors by a majority vote of a quorum consisting of Disinterested Directors (as hereinafter defined), or (ii) if a quorum of the Board of Directors consisting of Disinterested Directors is not obtainable or, even if obtainable, such quorum of Disinterested Directors so directs, by Independent Counsel in a written opinion to the Board of Directors, a copy of which shall be delivered to the claimant, or (iii) if a quorum of Disinterested Directors so directs, by the stockholders of the Corporation. In the event the determination of entitlement to indemnification is to be made by Independent Counsel at the request of the claimant, the Independent Counsel shall be selected by the Board of Directors unless there shall have occurred within two years prior to the date of the commencement of the action, suit or proceeding for which indemnification is claimed a "Change of Control" (as defined below) in which case the Independent Counsel shall be selected by the claimant unless the claimant shall request that such selection be made by the Board of Directors. If it is so determined that the

claimant is entitled to indemnification, payment to the claimant shall be made within 10 days after such determination. If the Corporation denies a written request for indemnification or advance of expenses, in whole or in part, or if payment in full pursuant to such request is not made within forty-five days (or, in the case of an advance of expenses, twenty days, provided that the director or officer has delivered the undertaking contemplated by paragraph (A) of this Section 6.7), the right to indemnification or advances as granted by this Section 6.7 shall be enforceable by the director or officer in any court of competent jurisdiction. Such person's costs and expenses incurred in connection with successfully establishing his or her right to indemnification, in whole or in part, in any such action shall also be indemnified by the Corporation. It shall be a defense to any such action (other than an action brought to enforce a claim for the advance of expenses where the undertaking required pursuant to paragraph (A) of this Section 6.7, if any, has been tendered to the Corporation) that the claimant has not met the standards of conduct which make it permissible under the GCL for the Corporation to indemnify the claimant for the amount claimed, but the burden of such defense shall be on the Corporation. Neither the failure of the Corporation (including its Board of Directors, independent legal counsel or its stockholders) to have made a determination prior to the commencement of such action that indemnification of the claimant is proper in the circumstances because such person has met the applicable standard of conduct set forth in the GCL, nor an actual determination by the Corporation (including its Board of Directors, independent legal counsel or its stockholders) that the claimant has not met such applicable standard of conduct, shall be a defense to the action or create a presumption that the claimant has not met the applicable standard of conduct. The procedure for indemnification of other employees and agents for whom indemnification is provided pursuant to paragraph (A) of this Section 6.7 shall be the same procedure set forth in this paragraph (C) of this Section 6.7 for directors or officers, unless otherwise set forth in the action of the Board of Directors providing indemnification for such employee or agent.

(D)      If a determination shall have been made pursuant to paragraph (C) of this Section 6.7 that the claimant is entitled to indemnification, the Corporation shall be bound by such determination in any judicial proceeding commenced pursuant to paragraph (C) of this Section 6.7.

(E)      The Corporation shall be precluded from asserting in any judicial proceeding commenced pursuant to paragraph (C) of this Section 6.7 that the procedures and presumptions of this Section 6.7 are not valid, binding and enforceable and shall stipulate in such proceeding that the Corporation is bound by all the provisions of this Section 6.7.

(F)      The rights to indemnification and to the advance of expenses conferred in this Section 6.7 shall not be exclusive of any other right which any person may have or hereafter acquire under these By-laws or under any statute, by-law, agreement, vote of stockholders or disinterested directors or otherwise. All rights to indemnification under this Section 6.7 shall be deemed to be a contract between the Corporation and each director or officer of the Corporation who serves or served in such capacity at any time while this Section 6.7 is in effect. Any repeal or modification of this Section 6.7 or any repeal or modification of relevant provisions of the GCL or any other applicable laws shall not in any way diminish any rights to indemnification of such director or officer or the obligations of the Corporation arising hereunder with respect to any proceeding arising out of, or relating to, any actions, transactions or facts occurring prior to the final adoption of such modification or repeal.

(G)      The Corporation may purchase and maintain insurance on its own behalf and on behalf of any person who is or was or has agreed to become a director, officer, employee or agent of the Corporation or is or was serving at the request of the Corporation as a director, officer,

employee or agent of another corporation, partnership, joint venture, trust or other enterprise against any expense, liability or loss asserted against him or her and incurred by him or her in any such capacity, or arising out of his or her status as such, whether or not the Corporation would have the power to indemnify such person against such expenses, liability or loss under the GCL.

(H)      Any person serving as a director, officer, employee or agent of another corporation, partnership, limited liability company, joint venture or other enterprise, at least 50% of whose equity interests are owned by the Corporation (a " subsidiary " for this Section 6.7) shall be conclusively presumed to be serving in such capacity at the request of the Corporation.

(I)      Persons who after the date of the adoption of these By-laws become or remain directors or officers of the Corporation or who, while a director or officer of the Corporation, become or remain a director, officer, employee or agent of a subsidiary, shall be conclusively presumed to have relied on the rights to indemnity, advance of expenses and other rights contained in this Section 6.7 in entering into or continuing such service. The rights to indemnification and to the advance of expenses conferred in this Section 6.7 shall apply to claims made against an indemnitee arising out of acts or omissions which occurred or occur both prior and subsequent to the adoption hereof.

(J)      For purposes of this Section 6.7, references to the "Corporation" shall include, in addition to the resulting Corporation, any constituent Corporation (including any constituent of a constituent) absorbed in a consolidation or merger which, if its separate existence had continued, would have had power and authority to indemnify its directors, officers and employees or agents, so that any person who is or was a director, officer, employee or agent of such constituent Corporation, or is or was serving at the request of such constituent Corporation as a director, officer, employee or agent of another Corporation, partnership, joint venture, trust or other enterprise, shall stand in the same position under this Section 6.7 with respect to the resulting or surviving Corporation as he or she would have with respect to such constituent Corporation if its separate existence had continued.

(K) If this Section 6.7 or any portion hereof shall be invalidated on any ground by any court of competent jurisdiction, then the Corporation shall nevertheless indemnify each person entitled to indemnification under paragraph (B) of this Section 6.7 as to all expense, liability and loss (including attorneys' fees and related disbursements, judgments, penalties, fines, ERISA excise taxes and penalties, and amounts paid or to be paid in settlement) actually and reasonably incurred or suffered by such person and for which indemnification is available to such person pursuant to this Section 6.7 to the fullest extent permitted by any applicable portion of this Section 6.7 that shall not have been invalidated and to the fullest extent permitted by applicable law.

(L) Unless the Corporation consents in writing to the selection of an alternative forum, the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Corporation, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director or officer or other employee of the Corporation to the Corporation or the Corporation's stockholders, (iii) any action asserting a claim against the Corporation or any director or officer or other employee of the Corporation arising pursuant to any provision of the GCL or the Corporation's Certificate of Incorporation or these By-laws (as either may be amended from time to time), or (iv) any action asserting a claim against the Corporation or any director or officer or other employee of the Corporation governed by the internal affairs doctrines shall be a state court located within the State of Delaware (or, if no state court located within the State of Delaware has jurisdiction, the United States District Court for the District of Delaware).

(M) For purposes of this Section 6.7:

(1) "Disinterested Director" means a director of the Corporation who is not and was not a party to the matter in respect of which indemnification is sought by the claimant.

(2) "Independent Counsel" means a law firm, a member of a law firm, or an independent practitioner, that is experienced in matters of corporation law and shall include any person who, under the applicable standards of professional conduct then prevailing, would not have a conflict of interest in representing either the Corporation or the claimant in an action to determine the claimant's rights under this Section 6.7.

(3) "Change of Control" has the meaning given such term in the Corporation's 2011 Stock Incentive Plan, as the same may be amended or superseded from time to time.

(N)      Any notice, request or other communication required or permitted to be given to the Corporation under this Section 6.7 shall be in writing and either delivered in person or sent by facsimile transmission, email, overnight mail or courier service, or certified or registered mail, postage prepaid, return receipt requested, to the Secretary of the Corporation and shall be effective only upon receipt by the Secretary.

ARTICLE VII

CONTRACTS, PROXIES, ETC.

Section 7.1.      Contracts. Except as otherwise required by law, the Certificate of Incorporation or these By-laws, any contracts or other instruments may be executed and delivered in the name and on the behalf of the Corporation by such officer or officers of the Corporation as the Board of Directors may from time to time direct. Such authority may be general or confined to specific instances as the Board of Directors may determine. The Chairman (if an elected officer), the President or any Vice President may execute bonds, contracts, deeds, leases and other instruments to be made or executed for or on behalf of the Corporation. Subject to any restrictions imposed by the Board of Directors or the Chairman (if an elected officer), the President or any Vice President of the Corporation may delegate contractual powers to others under his jurisdiction, it being understood, however, that any such delegation of power shall not relieve such officer of responsibility with respect to the exercise of such delegated power.

Section 7.2.      Proxies. Unless otherwise provided by resolution adopted by the Board of Directors, the Chairman (if an elected officer), the President or any Vice President may from time to time appoint an attorney or attorneys or agent or agents of the Corporation, in the name and on behalf of the Corporation, to cast the votes which the Corporation may be entitled to cast as the holder of stock or other securities in any other corporation, any of whose stock or other securities may be held by the Corporation, at meetings of the holders of the stock or other securities of such other corporation, or to consent in writing, in the name of the Corporation as such holder, to any action by such other corporation, and may instruct the person or persons so appointed as to the manner of casting such votes or giving such consent, and may execute or cause to be executed in the name and on behalf of the Corporation and under its corporate seal or otherwise, all such written proxies or other instruments as he may deem necessary or proper in the premises.

ARTICLE VIII

EXCLUSIVE FORUM

Section 8.1. Exclusive Forum . Unless the Corporation consents in writing to the selection of an alternative forum, the sole and exclusive forum for (i) any derivative action or proceeding brought on behalf of the Corporation, (ii) any action asserting a claim of breach of a fiduciary duty owed by any director or officer or other employee of the Corporation to the Corporation or the Corporation's stockholders, (iii) any action asserting a claim against the Corporation or any director or officer or other employee of the Corporation arising pursuant to any provision of the GCL or the Corporation's Certificate of Incorporation or By-laws (as either may be amended from time to time), or (iv) any action asserting a claim against the Corporation or any director or officer or other employee of the Corporation governed by the internal affairs doctrine shall be a state court located within the State of Delaware (or, if no state court located within the State of Delaware has jurisdiction, the United States District Court for the District of Delaware).

ARTICLE IX

AMENDMENTS

Section 9.1.      Amendments. These By-laws may be altered, amended, or repealed at any meeting of the Board of Directors or of the stockholders, provided notice of the proposed change was given in the notice of the meeting and, in the case of a meeting of the Board of Directors, in a notice given not less than two days prior to the meeting; provided, however, that, in the case of amendments by stockholders, notwithstanding any other provisions of these By-laws or any provision of law which might otherwise permit a lesser vote or no vote, but in addition to any affirmative vote of the holders of any particular class or series of the capital stock of the Corporation required by law, the Certificate of Incorporation or these By-laws, the affirmative vote of the holders of at least 80 percent of the voting power of all the then outstanding shares of the Voting Stock, voting together as a single class, shall be required to alter, amend or repeal any provision of these By-laws.

SECRETARY’S CERTIFICATE

The undersigned Secretary of W. R. Grace & Co. (the “Corporation”) does hereby certify the following:

1.      He is a duly appointed, qualified and acting Secretary of the Corporation.

2.      The foregoing is a complete and accurate copy of the Amended and Restated By-laws of the Corporation duly adopted by the Board of Directors of the Corporation at a meeting of the Board of Directors duly called and held on January 22, 2015 at which a quorum was present.

IN WITNESS WHEREOF , the undersigned has executed this Secretary’s Certificate as of January 22, 2015.