RPM's Performance Coatings Group Acquires Norwegian Flooring Coatings Business

MEDINA, Ohio, June 10, 2010 - RPM International Inc. (NYSE: RPM) today announced that its Performance
Coatings Group has acquired Hummervoll Industribelegg AS, a supplier and
installer of industrial flooring systems based in Bergen, Norway, with annual
sales of more than US$11 million. Terms of the transaction, which is expected
to be accretive to earnings within one year, were not disclosed.

Hummervoll, founded in 1980 by Per Hummervoll, serves both onshore and
offshore markets with its concrete- and epoxy-based flooring systems. Its
onshore division primarily focuses on the food, manufacturing and chemical
industries. The offshore division provides flooring solutions for oil
platforms, barricade decks and emergency escape routes.

"The addition of Hummervoll to the RPM Performance Coatings Group
presents both top- and bottom-line growth opportunities for RPM. In
particular, it broadens our presence in Scandinavia by expanding our overall
product line, sales force, installation teams and customer base," stated
Frank C. Sullivan, RPM chairman and chief executive officer. "We welcome Per
Hummervoll and his management team to the family of RPM companies and look
forward to supporting their continuing growth."

About RPM

RPM International Inc., a holding company, owns subsidiaries that are
world leaders in specialty coatings, sealants, building materials and related
services serving both industrial and consumer markets. RPM's industrial
products include roofing systems, sealants, corrosion control coatings,
flooring coatings and specialty chemicals. Industrial brands include
Stonhard, Tremco, illbruck, Carboline, Flowcrete, Universal Sealants and
Euco. RPM's consumer products are used by professionals and do-it-yourselfers
for home maintenance and improvement, boat repair and maintenance, and by
hobbyists. Consumer brands include Zinsser, Rust-Oleum, DAP, Varathane and
Testors. Additional details are available at www.rpminc.com.

For more information, contact Robert L. Matejka, senior vice president
and chief financial officer, at +1-330-273-5090 or rmatejka@rpminc.com.

This press release contains "forward-looking statements" relating to our
business. These forward-looking statements, or other statements made by us,
are made based on our expectations and beliefs concerning future events
impacting us, and are subject to uncertainties and factors (including those
specified below) which are difficult to predict and, in many instances, are
beyond our control. As a result, our actual results could differ materially
from those expressed in or implied by any such forward-looking statements.
These uncertainties and factors include (a) global markets and general
economic conditions, including uncertainties surrounding the volatility in
financial markets, the availability of capital and the effect of changes in
interest rates, and the viability of banks and other financial institutions;
(b) the prices, supply and capacity of raw materials, including assorted
pigments, resins, solvents and other natural gas- and oil-based materials;
packaging, including plastic containers; and transportation services,
including fuel surcharges; (c) continued growth in demand for our products;
(d) legal, environmental and litigation risks inherent in our construction
and chemicals businesses and risks related to the adequacy of our insurance
coverage for such matters; (e) the effect of changes in interest rates; (f)
the effect of fluctuations in currency exchange rates upon our foreign
operations; (g) the effect of non-currency risks of investing in and
conducting operations in foreign countries, including those relating to
domestic and international political, social, economic and regulatory
factors; (h) risks and uncertainties associated with our ongoing acquisition
and divestiture activities; (i) risks related to the adequacy of our
contingent liability reserves, including for asbestos-related claims and
warranty obligations; and (j) other risks detailed in our filings with the
Securities and Exchange Commission, including the risk factors set forth in
our Annual Report on Form 10-K for the year ended May 31, 2009, as the same
may be updated from time to time. We do not undertake any obligation to
publicly update or revise any forward-looking statements to reflect future
events, information or circumstances that arise after the date of this
release.

Robert L. Matejka, Senior Vice President and Chief Financial Officer, +1-330-273-5090, rmatejka at rpminc.com