Exhibit 99.1

RPM Reports Fiscal 2012 Second-Quarter Results

MEDINA, OH – January 5, 2012 – RPM International Inc. (NYSE: RPM) today reported sharply improved net sales for its fiscal 2012 second quarter ended November 30, 2011. Net income increased slightly and earnings per diluted share were flat, due to higher raw material and acquisition-related expenses.

Second-Quarter Results

Net sales grew 10.9% to $916.1 million from $826.3 million a year ago. Consolidated EBIT increased 4.0%, to $93.0 million from $89.4 million in the year-ago second quarter. Net income attributable to RPM stockholders was up 2.3%, to $49.9 million from $48.8 million in the fiscal 2011 second quarter. Earnings per diluted share for the second quarter were $0.38 in both years.

“Investments in future growth, including much higher acquisition expenses associated with the roughly $165 million in annualized sales from businesses acquired so far this fiscal year, and higher raw material costs were the primary factors behind our net income lagging sales growth,” stated Frank C. Sullivan, chairman and chief executive officer. “Raw material costs continued to be a challenge during our second quarter and typically have a more significant impact on our consumer segment, which faces longer lead times in adjusting prices than our industrial segment,” he stated.

Earnings for the second quarter of fiscal 2011 and 2012 were both impacted by “one-time” items. As previously reported, last year’s second quarter contained approximately $7.5 million in non-recurring items, representing an after-tax benefit of approximately $0.04 per share.

This year’s second quarter results of $0.38 per share include the benefit of the company’s equity ownership in Kemrock Industries and Exports Ltd. of $0.04 per share, partially offset by $0.03 per share from the impact of higher acquisition-related expenses.

Excluding “one-time” items from both years, diluted earnings per share for the fiscal 2012 second quarter of $0.37 exceeded diluted earnings per share for the same quarter last year of $0.34, for an increase of 8.8%.

Second-Quarter Segment Sales and Earnings

During the second quarter, industrial segment sales grew 10.1% to $641.5 million from $582.5 million in the fiscal 2011 second quarter. Organic sales improved 5.9%, including 0.2% in foreign exchange translation losses, while acquisition growth added 4.2%. Industrial segment EBIT increased 14.0%, to $78.3 million from $68.7 million in the fiscal 2011 second quarter.

RPM Reports Fiscal 2012 Second-Quarter Results

January 5, 2012

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In the second quarter, RPM’s ownership position in Kemrock, India’s leading producer of reinforced polymer composites, exceeded 20% for the first time, thereby triggering a reportable equity ownership position in a portion of Kemrock’s earnings. As a result, the industrial segment’s EBIT included $5.2 million in equity in earnings of Kemrock, of which $4.6 million related to a one-time cumulative catch-up benefit. Industrial EBIT also included higher acquisition-related expenses of $1.8 million, partially offsetting the Kemrock benefit.

“High performance corrosion control coatings, commercial flooring, bridge deck products and edible shellac products all posted double digit sales increases, with most other industrial products having solid sales improvements,” Sullivan stated.

RPM’s consumer segment sales increased 12.6% to $274.6 million from $243.8 million in the fiscal 2011 second quarter. Organic sales improved 12.5%, with no foreign exchange impact, while acquisition growth added 0.1%. Consumer segment EBIT fell 2.0%, to $26.8 million from $27.3 million a year ago.

“Our consumer product lines enjoyed solid organic sales volume growth due to strong market acceptance of higher end new products and increased market share, but their difficulty in quickly passing along higher raw material costs kept this sales increase from immediately carrying to the bottom line,” stated Sullivan.

Corporate and other expenses were higher by approximately $5.4 million, due primarily to higher acquisition costs of $3.0 million and insurance recoveries of $2.9 million realized in the prior-year second quarter.

Cash Flow and Financial Position

For the first half of fiscal 2011, cash from operations was $110.0 million compared to $183.1 million a year ago. Although RPM experienced a favorable decline in accounts receivable during the strong sales quarter, higher inventory attributable to higher raw material costs, a drop in accounts payable due to the timing of payments and a decrease in other accrued liabilities were the primary drivers to the overall cash shortfall to last year. Capital expenditures of $18.4 million compare to depreciation of $25.9 million during the first half of this fiscal year. Total debt at the end of the first half was $1.094 billion compared to $925.1 million at the end of the fiscal 2011 second quarter and $1.109 billion at the end of the 2011 fiscal year. RPM’s net (of cash) debt-to-total capitalization ratio was 38.7%, compared to 34.8% at May 31, 2011, and it continues to be at the low end of the company’s historic norms. At November 30, 2011, liquidity stood at $803.9 million, including cash of $301.0 million and $502.9 million in long-term committed available credit.

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January 5, 2012

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“In addition to supporting our growing cash dividend and internal capital investments, this solid cash and liquidity position enables RPM to continue a more robust acquisition program. Businesses with approximately $165 million in annual sales have been acquired so far this fiscal year, all of which will be accretive to earnings within a year,” Sullivan stated.

First-Half Sales and Earnings

Fiscal 2012 first-half net sales, net income and diluted earnings per share all improved. Net sales increased 10.5% to $1.90 billion from $1.72 billion during the first six months of fiscal 2011. Consolidated EBIT increased 8.6% to $229.5 million from $211.4 million during the first six months of fiscal 2011. Net income attributable to RPM stockholders improved 7.6% to $126.7 million from $117.8 million in the fiscal 2011 first half. Diluted earnings per share attributable to RPM stockholders grew 6.6% to $0.97 from $0.91 a year ago.

First-Half Segment Sales and Earnings

RPM’s industrial segment first-half sales improved 10.4%, to $1.31 billion from $1.18 billion in the fiscal 2011 first half. The organic sales increase was 7.5%, including net foreign exchange translation gains of 2.4%, while acquisition growth added 2.9%. Industrial segment EBIT grew 12.3% to $170.8 million from $152.0 million a year ago, including $5.2 million, or 3.4%, from the recognition of RPM’s share of Kemrock’s net earnings, of which $4.6 million related to a one-time cumulative catch-up benefit.

First-half sales for the consumer segment increased 10.6% to $593.4 million from $536.3 million a year ago. Organic sales increased 10.7%, including net foreign exchange gains of 1.1%. A small divestiture reduced the improvement by 0.1%. Consumer segment EBIT increased 2.5% to $78.3 million from $76.3 million in the first half a year ago.

Acquisitions

During the second quarter and subsequent to it, RPM announced acquisitions with sales totaling more than $130 million, all of which are expected to be accretive to earnings within one year.

On September 30, 2011, the company’s RPM2 business unit acquired the Legend Brands group of companies, which provide equipment and solutions for water and fire damage restoration, professional cleaning and environmental control. Based in Burlington, WA, the business has annual sales of more than $70 million.

The RPM Performance Coatings Group announced the acquisition of the Grupo P&V group of companies on October 5, 2011. Grupo P&V is a leading vertically integrated supplier of passive fire protection and insulation products based in Barcelona, Spain. Annual sales are approximately $23 million.

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Subsequent to the close of the fiscal 2012 second quarter, the RPM Building Solutions Group completed the acquisition of FEMA Farben + Putze GmbH on January 3, 2012. This business, with annual sales of more than $40 million, is a leading supplier of external insulating and finish systems and related products to the German and French construction markets.

Business Outlook

“We reiterate our full year guidance announced on July 25, 2011, which anticipated sales growth of 8% to 10% and growth in diluted earnings per share of 10% to 15%. As usual, we expect weaker results for the seasonally difficult fiscal third quarter ending February 29, 2012, but anticipate a strong fiscal fourth quarter, with continued strength in top-line sales from both our industrial and consumer segments, combined with a moderating of raw material costs and improved gross margin contribution,” Sullivan stated.

Webcast and Conference Call Information

Management will host a conference call to further discuss these results beginning at 10:00 a.m. EST today. The call can be accessed by dialing 800-599-9795 or 617-786-2905 for international callers. Participants are asked to call the assigned number approximately 10 minutes before the conference call begins. The call, which will last approximately one hour, will be open to the public, but only financial analysts will be permitted to ask questions. The media and all other participants will be in a listen-only mode.

For those unable to listen to the live call, a replay will be available from approximately 1:00 p.m. EST on January 5, 2012 until 11:59 p.m. EST on January 12, 2012. The replay can be accessed by dialing 888-286-8010 or 617-801-6888 for international callers. The access code is 35065461. The call also will be available both live and for replay, and as a written transcript, via the RPM web site at www.rpminc.com.

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, Fibergrate and Euco. RPM’s consumer products are used by professionals and do-it-yourselfers for home maintenance and improvement 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 330-273-5090 or rmatejka@rpminc.com.

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RPM Reports Fiscal 2012 Second-Quarter Results

January 5, 2012

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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; (j) risks and uncertainties associated with the SPHC bankruptcy proceedings; and (k) 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, 2011, 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.

CONSOLIDATED STATEMENTS OF INCOME

IN THOUSANDS, EXCEPT PER SHARE DATA

(Unaudited)

SUPPLEMENTAL SEGMENT INFORMATION

IN THOUSANDS

(Unaudited)

CONSOLIDATED BALANCE SHEETS

IN THOUSANDS

CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED) IN THOUSANDS