EXHIBIT 4.5.1 AMENDMENT NO. 1 TO THE RPM, INC. DEFERRED COMPENSATION PLAN THIS AMENDMENT NO. 1 (the "Amendment") to the RPM, Inc. Deferred Compensation Plan (hereinafter known as the "Plan") is executed by RPM, Inc. (hereinafter known as the "Company") and acknowledged by RPM International Inc. (hereinafter known as the "Successor Company"), as of the dates set forth below. WITNESSETH: WHEREAS, the Company maintains the Plan for the benefit of certain of its employees and certain employees of affiliated companies; and WHEREAS, in connection with the reincorporation of the Company as a Delaware corporation, the Company has agreed to assign, and the Successor Company has agreed to assume, all of the powers, authorities, duties, responsibilities and obligations of the Company with respect to the Plan in accordance with an Agreement and Plan of Merger, dated August 29, 2002 (the "Merger Agreement"); and WHEREAS, it is the desire of the Company to amend the Plan in order to reflect the reincorporation of the Company, the assumption of the Plan by the Successor Company, and the new name of the Plan, all of which will become effective, unless otherwise indicated, as of the effective time of the reincorporation of the Company, which shall be 9:00 a.m. on October 15, 2002 (the "Effective Time"); and WHEREAS, immediately following the Effective Time, the Successor Company and the Company will enter into an agreement (the "Reorganization Agreement"), pursuant to which agreement the Company will transfer the stock ownership of various of its operating companies to Successor Company; and WHEREAS, the Company reserved the right, pursuant to Section 13.2 of the Plan, to make certain amendments thereto; NOW, THEREFORE, pursuant to Section 13.2 of the Plan, the Company hereby amends the Plan, effective as of the Effective Time, unless indicated otherwise, as follows: 1. The name of the Plan is hereby changed to the "RPM International Inc. Deferred Compensation Plan." 2. With the exception of any references specifically set forth in this Amendment, including, without limitation, the definition of "Merger Agreement" and "Reorganization Agreement," the Plan is hereby amended by the deletion of each reference to the term "RPM, Inc." as a corporate entity, including but not limited to, the definition of the term "Company" in Section 1.18, references to the RPM, Inc. Stock Unit Funds I and II and the signature block, and the substitution in lieu thereof of the term "RPM International Inc." as the corporate entity. 3. The Plan is hereby amended by the deletion of each reference to the term "RPM, Inc." as the sponsor of certain employee benefit plans, including but not limited to, the following employee benefit plans: the RPM, Inc. Deferred Compensation Plan, the RPM, Inc. 1997 Restricted Stock Plan, the RPM, Inc. 401(k) Trust and Plan and the RPM, Inc. Retirement Plan, as well as the reference to RPM, Inc. in the definition of the term "Plan" in Section 1.37, and the substitution in lieu thereof of the term "RPM International Inc." as the sponsor of such plans. 4. With the exception of any references specifically set forth in this Amendment, including, without limitation, the definition of "Merger Agreement" and "Reorganization Agreement," the Plan is hereby amended by the deletion of each reference to RPM, Inc. as an Ohio corporation in every instance that it appears, including but not limited to, the "Purpose" 2 provisions, the definition of the term "Company" in Section 1.18 and the signature block, and the substitution in lieu thereof of the reference to RPM International Inc. as a Delaware corporation. 5. The Plan is hereby amended by the deletion of each reference to the term "RPM, Inc." as the issuer of shares of common stock, and the substitution in lieu thereof of the term "RPM International Inc." as the issuer of shares. 6. Effective immediately prior to the Effective Time, Section 1.14 of the Plan is hereby amended by the addition of a new sentence to the end of said section to read as follows: "Notwithstanding the foregoing provisions of this Section, a Change in Control shall not be deemed to have occurred as a result of (i) the execution of the Merger Agreement or the Reorganization Agreement; (ii) the assignment by the Company to the Successor Company and the assumption by the Successor Company of all of the powers, authorities, duties, responsibilities and obligations of the Company with respect to the Plan; or (iii) the consummation of any other transaction contemplated in the Merger Agreement or the Reorganization Agreement." 7. Effective immediately prior to the Effective Time, Article 1 of the Plan is hereby amended by the addition of a new Section 1.35A to read as follows: "1.35A `Merger Agreement' shall mean the Agreement and Plan of Merger, dated as of August 29, 2002, by and among RPM International Inc., RPM, Inc. and RPM Merger Company, an Ohio corporation, as it may be amended, supplemented or replaced from time to time." 8. Effective immediately prior to the Effective Time, Article 1 of the Plan is hereby amended by the addition of a new Section 1.40A to read as follows: "1.40A `Reorganization Agreement' shall mean the Reorganization Agreement, effective as of October 15, 2002, by and between RPM International Inc. and RPM, Inc., as it may be amended, supplemented or replaced from time to time." 3 9. Section 1.48 of the Plan is hereby amended by the deletion of said section in its entirety and the substitution in lieu thereof of a new Section 1.48 to read as follows: "1.48 'Stock' shall mean RPM International Inc. authorized shares of common stock (par value $.01 per share) or any other equity securities of the Company designated by the Committee." [Signature Page Follows] 4 IN WITNESS WHEREOF, RPM, Inc., by its duly authorized officers, has caused this Amendment to the RPM, Inc. Deferred Compensation Plan to be signed this 14th day of October, 2002. RPM, INC. By: /s/ P. Kelly Tompkins ------------------------------ P. Kelly Tompkins, Secretary The Successor Company hereby expressly acknowledges its assumption of all of the powers, authorities, duties, responsibilities and obligations of the Company with respect to the Plan as of the Effective Time. RPM INTERNATIONAL INC. By: /s/ Keith R. Smiley ------------------------------ Keith R. Smiley, Treasurer and Assistant Secretary 5