Exhibit 99.1

RPM Reports Sharply Improved Fiscal 2011 Third-Quarter Results

	•		Third-quarter net sales increase 13% over pro-forma prior year
	•		Positive net income and earnings per share contrast with year-earlier loss in seasonally weak third quarter
	•		Company increases full-year guidance for fiscal 2011

MEDINA, OH — April 7, 2011 — RPM International Inc. (NYSE: RPM) today reported a sharp increase in net sales for its fiscal 2011 third quarter ended February 28, 2011, compared to year-earlier pro-forma net sales. RPM also posted positive net income and earnings per share for the seasonally weak quarter, contrasted with a year-earlier pro-forma loss. Prior-year pro-forma results assume that the deconsolidation of its Specialty Products Holding Corp. (SPHC) and subsidiaries occurred before fiscal 2010. The deconsolidation eliminated approximately $300 million in annual revenues from the company’s industrial segment beginning June 1, 2010.

Third-Quarter Results

Net sales, net income and earnings per share for the third quarter all posted sharp improvements versus prior-year pro-forma results. Net sales grew 12.6% to $678.9 million from a pro-forma $603.1 million, while net income attributable to RPM stockholders was $1.1 million, compared to a year earlier pro-forma loss of $9.7 million. Diluted earnings per share were $0.01, contrasted with a pro-forma loss of $0.08 in the year-ago period. Consolidated earnings before interest and taxes (EBIT) grew 323.8%, to $13.6 million from a pro-forma $3.2 million in the fiscal 2010 third quarter.

“We are extremely pleased with RPM’s performance during the typically weak third quarter and in the face of significantly higher raw material costs coupled with severe winter weather conditions across the U.S. Nearly all of our business units generated strong sales increases and substantially stronger growth in earnings,” stated Frank C. Sullivan, chairman and chief executive officer.

On an as-reported basis, RPM’s net sales of $678.9 million were up 1.8% from the $666.6 million reported in the fiscal 2010 third quarter. Net income attributable to RPM stockholders was $1.1 million, contrasted with a loss of $9.4 million in the third quarter of fiscal 2010, while earnings per diluted share of $0.01 compared to a loss of $0.07 a year ago. Consolidated EBIT increased 375.8% to $13.6 million from $2.9 million in the fiscal 2010 third period.

Third-Quarter Segment Sales and Earnings

On a pro-forma basis, industrial segment sales grew 14.0% to $449.1 million in the fiscal 2011 third quarter from a pro-forma $393.9 million a year ago. Organic sales improved 11.2%, including 0.3% in foreign exchange translation gains, while acquisition growth added 2.8%. Industrial segment EBIT increased 664.1%, to $13.6 million from a pro-forma $1.8 million in the fiscal 2010 third quarter.

“Following two years of depressed demand for our products serving commercial construction markets, we are starting to see some improvement in our businesses that address this sector of the economy,

RPM Reports Sharply Improved Fiscal 2011 Third-Quarter Results
April 7, 2011
Page 2

both domestically and in Europe. At the same time, our high-performance industrial coatings, maintenance products and polymer flooring systems continued their strong sales performance,” Sullivan stated.

RPM’s consumer segment, largely unaffected by the deconsolidation, had a 9.8% increase in net sales to $229.8 million from a pro-forma $209.2 million in the fiscal 2010 third quarter. Organic sales were up 9.9%, including foreign exchange translation gains of 0.1%, while the divestiture of a small product line reduced organic growth by 0.1%. Consumer segment EBIT improved 30.1%, to $16.0 million from a pro-forma $12.3 million a year ago.

“Our consumer lines benefited from the gradual economic recovery, consumer acceptance of new product introductions and market share gains achieved during the recent downturn,” stated Sullivan.

Cash Flow and Financial Position

For the first nine months of fiscal 2011, cash from operations was $191.0 million, compared to $188.9 million in the first nine months of fiscal 2010. Capital expenditures during the current nine-month period of $21.7 million compare to depreciation of $39.5 million. Total debt at the end of the first nine months was $935.7 million, compared to $928.6 million at the end of fiscal 2010 and $908.1 million at the end of the third quarter of fiscal 2010. RPM’s net (of cash) debt-to-total capitalization ratio was 35.3%, compared to 39.8% at May 31, 2010, and both remain at the low end of the company’s historic norms.

On January 5, 2011, RPM replaced its $400 million bank revolving credit facility, having a December 2011 maturity date, with a new $400 million revolving credit facility, which is due in January 2015. The new facility reduced the cost of RPM’s bank borrowing spread to 2.0% from 2.5% and changed the debt-to-total capitalization ratio limitation to 60% from 55%.

“We are using our strong cash and liquidity position to support a very robust acquisition pipeline, as well as internal investment. At February 28, 2011, liquidity, including cash and long-term committed available credit, stood at $715.7 million,” Sullivan stated.

Nine-Month Sales and Earnings

On a pro-forma basis, fiscal 2011 nine-month net sales, net income and earnings per share all posted gains. Net sales increased 7.6% to $2.4 billion from a pro-forma $2.2 billion during the first nine months of fiscal 2010. Net income attributable to RPM stockholders improved 16.8% to $118.9 million from a pro-forma $101.7 million in the fiscal 2010 first nine months. Diluted earnings per share attributable to RPM stockholders grew 15.2% to $0.91 from a pro-forma $0.79 a year ago. Consolidated EBIT increased 10.6% to $225.0 million from a pro-forma $203.4 million during the first nine months of fiscal 2010.

On an as-reported basis, net sales for the first nine months of fiscal 2011 declined 1.7% to $2.40 billion from the $2.44 billion reported a year ago. Nine-month net income attributable to RPM stockholders also declined 0.5% to $118.9 million from $119.5 million reported during the first nine months of

RPM Reports Sharply Improved Fiscal 2011 Third-Quarter Results
April 7, 2011
Page 3

fiscal 2010. Diluted earnings per share attributable to RPM stockholders fell 2.2% to $0.91 in the fiscal 2011 first nine months from $0.93 a year ago. Consolidated EBIT was $225.0 million, up 3.7% from the $216.9 million reported in the fiscal 2010 first nine months.

Nine-Month Segment Sales and Earnings

Sales for RPM’s industrial segment increased 10.1%, to $1.63 billion from a pro-forma $1.48 billion in the fiscal 2010 first nine months. The organic sales increase was 6.8%, including net foreign exchange losses of 0.7%, and acquisition growth added 3.3%. Industrial segment EBIT grew 12.2% to $165.6 million from a pro-forma $147.5 million in the first nine months of fiscal 2010.

In the consumer segment, nine-month sales increased 2.7% to $766.2 million from a pro-forma $746.4 million reported in the first nine months of fiscal 2010. Organic sales increased by 2.6%, including net foreign exchange losses of 0.3%, offset by acquisition growth net of a small divestiture of 0.1%. Consumer segment EBIT fell 2.4%, to $92.3 million from a pro-forma $94.7 million in the first nine months a year ago.

Corporate and other expenses were lower for the nine-month period by approximately $5.8 million, due primarily to insurance recoveries of $2.9 million and ongoing expense improvements.

Synthetic Fiber Manufacturer Acquired

On February 10, 2011, RPM announced that its Euclid Chemical Company acquired PSI Packaging, Inc. (PSI), a $6 million producer of micro- and macro-fibers for the ready-mixed and pre-cast concrete market. With headquarters and manufacturing located in LaFayette, GA, PSI will operate as part of Euclid Chemical and will provide both a complementary product line to existing Euclid Chemical fiber products, as well as manufacturing capacity and expertise. Terms of the transaction, which is expected to be accretive to earnings within one year, were not disclosed.

Business Outlook

“As a result of the comparatively strong third-quarter performance in a seasonally weak period, as well as our fourth-quarter outlook, we are increasing our fiscal year 2011 guidance. We now expect sales growth of between 7% and 8% to approximately $3.35 billion from a pro-forma base of $3.12 billion in fiscal 2010 and growth in diluted earnings per share to a range of $1.40 to $1.45, up from a pro-forma $1.26 per share in fiscal 2010. Our original guidance, announced on July 26, 2010, anticipated sales growth of between 4% and 5% to approximately $3.25 billion and growth in diluted earnings per share to a range of $1.35 to $1.40. During the third quarter, we saw signs of improvement in the commercial construction market, while consumer sales also rebounded from a flat first six months. Both price and availability of raw materials remain challenging, and we expect this environment to continue through the fourth quarter and into the 2012 fiscal year,” Sullivan stated.

RPM Reports Sharply Improved Fiscal 2011 Third-Quarter Results
April 7, 2011
Page 4

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 866-362-4829 or 617-597-5346 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. EDT on April 7, 2011 until 11:59 p.m. EDT on April 14, 2011. The replay can be accessed by dialing 888-286-8010 or 617-801-6888 for international callers. The access code is 38917518. 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, Euco, Flowcrete and Universal Sealants. 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.

# # #

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, 2010, 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

		AS REPORTED																	PRO FORMA (a)
		Three Months Ended								Nine Months Ended									Three Months Ended				Nine Months Ended
		February 28,								February 28,									February 28,				February 28,
		2011				2010				2011				2010					2010				2010
Net Sales		$	678,920			$	666,594			$	2,400,073			$	2,441,205				$	603,083			$	2,230,560
Cost of sales			409,402				406,762				1,415,632				1,424,332					366,313				1,295,439
Gross profit			269,518				259,832				984,441				1,016,873					236,770				935,121
Selling, general & administrative expenses			255,930				256,976				759,421				799,975					233,564				731,679
Interest expense			16,502				15,802				49,012				43,271					15,796				43,254
Investment (income), net			(4,903	)			(1,833	)			(11,189	)			(4,984	)				(1,802	)			(4,795	)
Income before income taxes			1,989				(11,113	)			187,197				178,611					(10,788	)			164,983
Provision for income taxes			796				(1,949	)			57,507				58,305					(2,332	)			52,659
Net income			1,193				(9,164	)			129,690				120,306					(8,456	)			112,324
Less: Net income attributable to noncontrolling interests			96				236				10,806				788					1,216				10,581
Net income attributable to RPM International Inc. Stockholders		$	1,097			$	(9,400	)		$	118,884			$	119,518				$	(9,672	)		$	101,743
Earnings per share of common stock attributable to RPM International Inc. Stockholders:
Basic		$	0.01			$	(0.07	)		$	0.92			$	0.93				$	(0.08	)		$	0.79
Diluted		$	0.01			$	(0.07	)		$	0.91			$	0.93				$	(0.08	)		$	0.79
Average shares of common stock outstanding — basic			127,166				127,500				127,383				126,940					127,500				126,940
Average shares of common stock outstanding — diluted			129,442				127,500				128,020				127,539					127,500				127,539

SUPPLEMENTAL SEGMENT INFORMATION
IN THOUSANDS
UNAUDITED

		AS REPORTED																	PRO FORMA (a)
		Three Months Ended								Nine Months Ended									Three Months Ended				Nine Months Ended
		February 28,								February 28,									February 28,				February 28,
		2011				2010				2011				2010					2010				2010
Net Sales:
Industrial Segment		$	449,092			$	457,683			$	1,633,914			$	1,695,206				$	393,861			$	1,484,144
Consumer Segment			229,828				208,911				766,159				745,999					209,222				746,416
Total		$	678,920			$	666,594			$	2,400,073			$	2,441,205				$	603,083			$	2,230,560
Income Before Income Taxes (b):
Industrial Segment
Income Before Income Taxes (b)		$	12,603			$	1,442			$	162,754			$	160,742				$	1,737			$	146,971
Interest (Expense), Net (c)			(968	)			(17	)			(2,837	)			(384	)				(39	)			(553	)
EBIT (d)		$	13,571			$	1,459			$	165,591			$	161,126				$	1,776			$	147,524
Consumer Segment
Income Before Income Taxes (b)		$	16,002			$	12,340			$	92,381			$	94,320				$	12,295			$	94,655
Interest (Expense), Net (c)			3				3				33				(7	)				1				(8	)
EBIT (d)		$	15,999			$	12,337			$	92,348			$	94,327				$	12,294			$	94,663
Corporate/Other
(Expense) Before Income Taxes (b)		$	(26,616	)		$	(24,895	)		$	(67,938	)		$	(76,451	)			$	(24,820	)		$	(76,643	)
Interest (Expense), Net (c)			(10,634	)			(13,955	)			(35,019	)			(37,896	)				(13,956	)			(37,898	)
EBIT (d)		$	(15,982	)		$	(10,940	)		$	(32,919	)		$	(38,555	)			$	(10,864	)		$	(38,745	)
Consolidated
Income Before Income Taxes (b)		$	1,989			$	(11,113	)		$	187,197			$	178,611				$	(10,788	)		$	164,983
Interest (Expense), Net (c)			(11,599	)			(13,969	)			(37,823	)			(38,287	)				(13,994	)			(38,459	)
EBIT (d)		$	13,588			$	2,856			$	225,020			$	216,898				$	3,206			$	203,442

CONSOLIDATED BALANCE SHEETS

IN THOUSANDS

		February 28, 2011				February 28, 2010				May 31, 2010
		(Unaudited)				(Unaudited)
Assets
Current Assets
Cash and cash equivalents		$	275,479			$	256,199			$	215,355
Trade accounts receivable			566,355				526,460				654,435
Allowance for doubtful accounts			(22,485	)			(24,270	)			(20,525	)
Net trade accounts receivable			543,870				502,190				633,910
Inventories			472,984				441,578				386,982
Deferred income taxes			21,434				44,215				19,788
Prepaid expenses and other current assets			217,962				222,689				194,126
Total current assets			1,531,729				1,466,871				1,450,161
Property, Plant and Equipment, at Cost			978,169				1,067,577				924,086
Allowance for depreciation and amortization			(596,691	)			(622,618	)			(541,559	)
Property, plant and equipment, net			381,478				444,959				382,527
Other Assets
Goodwill			824,413				882,739				768,244
Other intangible assets, net of amortization			314,368				366,127				303,159
Deferred income taxes, non-current			—				62,474				—
Other			103,770				114,195				99,933
Total other assets			1,242,551				1,425,535				1,171,336
Total Assets		$	3,155,758			$	3,337,365			$	3,004,024
Liabilities and Stockholders’ Equity
Current Liabilities
Accounts payable		$	264,539			$	230,361			$	299,596
Current portion of long-term debt			2,867				5,534				4,307
Accrued compensation and benefits			127,964				121,856				136,908
Accrued loss reserves			64,885				74,562				65,813
Asbestos-related liabilities			—				75,000				—
Other accrued liabilities			144,398				132,271				124,870
Total current liabilities			604,653				639,584				631,494
Long-Term Liabilities
Long-term debt, less current maturities			932,839				902,563				924,308
Asbestos-related liabilities			—				357,891				—
Other long-term liabilities			256,265				200,924				243,829
Deferred income taxes			55,331				28,389				43,152
Total long-term liabilities			1,244,435				1,489,767				1,211,289
Total liabilities			1,849,088				2,129,351				1,842,783
Stockholders’ Equity
Preferred stock; none issued Common stock (outstanding 130,430; 129,601; 129,918)			1,304				1,296				1,299
Paid-in capital			745,514				798,721				724,089
Treasury stock, at cost			(62,430	)			(40,237	)			(40,686	)
Accumulated other comprehensive (loss)			(13,122	)			(23,798	)			(107,791	)
Retained earnings			540,258				468,675				502,562
Total RPM International Inc. stockholders’ equity			1,211,524				1,204,657				1,079,473
Noncontrolling interest			95,146				3,357				81,768
Total equity			1,306,670				1,208,014				1,161,241
Total Liabilities and Stockholders’ Equity		$	3,155,758			$	3,337,365			$	3,004,024

CONSOLIDATED STATEMENTS OF CASH FLOWS

IN THOUSANDS
UNAUDITED

		Nine Months Ended
		February 28,
		2011				2010
Cash Flows From Operating Activities:
Net income		$	129,690			$	120,306
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation			39,482				46,622
Amortization			15,049				16,600
Deferred income taxes			5,831				23,765
Stock-based compensation expense			8,769				7,423
Other			(308	)			(1,130	)
Changes in assets and liabilities, net of effect from purchases and sales of businesses:
Decrease in receivables			98,554				154,567
(Increase) in inventory			(81,387	)			(27,732	)
(Increase) in prepaid expenses and other current and long-term assets			(15,564	)			(16,906	)
(Decrease) in accounts payable			(38,356	)			(72,592	)
(Decrease) in accrued compensation and benefits			(9,509	)			(10,246	)
(Decrease) in accrued loss reserves			(958	)			(2,830	)
Increase in other accrued liabilities			25,284				4,171
Payments made for asbestos-related claims							(57,437	)
Other			14,407				4,292
Cash From Operating Activities			190,984				188,873
Cash Flows From Investing Activities:
Capital expenditures			(21,737	)			(14,069	)
Acquisition of businesses, net of cash acquired			(38,972	)			(63,669	)
Purchase of marketable securities			(71,556	)			(76,166	)
Proceeds from sales of marketable securities			63,369				66,375
Other			2,347				(186	)
Cash (Used For) Investing Activities			(66,549	)			(87,715	)
Cash Flows From Financing Activities:
Additions to long-term and short-term debt			37,831				304,106
Reductions of long-term and short-term debt			(30,739	)			(327,472	)
Cash dividends			(81,189	)			(78,798	)
Repurchase of stock			(21,759	)			(1,832	)
Exercise of stock options			8,053				6,919
Cash (Used For) Financing Activities			(87,803	)			(97,077	)
Effect of Exchange Rate Changes on Cash and Cash Equivalents			23,492				(1,269	)
Net Change in Cash and Cash Equivalents			60,124				2,812
Cash and Cash Equivalents at Beginning of Period			215,355				253,387
Cash and Cash Equivalents at End of Period		$	275,479			$	256,199