EXHIBIT 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

The Board of Directors
RPM International Inc.:

We consent to the incorporation by reference in the Registration Statement (File No. 333-101501) on Form S-8 of RPM International Inc. of our report dated June 23, 2011 relating to the statement of net assets available for benefits of RPM International Inc. Union 401(k) Trust and Plan as of December 31, 2010 and 2009, and the related statement of changes in net assets available for benefits for the year ended December 31, 2010, which appears in the December 31, 2010 annual report on Form 11-K of RPM International Inc.

SS&G Financial Services, Inc.
 

Cleveland, Ohio 

June 23, 2011