Exhibit 99.1

RPM Reports Results for Fiscal 2020 Fourth Quarter and Year End

MEDINA, OH – July 27, 2020 – RPM International Inc. (NYSE: RPM), a world leader in specialty coatings, sealants and building materials, today reported financial results for its fiscal 2020 fourth quarter and year ended May 31, 2020.

“As anticipated, our growth was temporarily impacted by the Covid-19 pandemic, but proactive measures, including our MAP to Growth program, helped mitigate the impact on our bottom line,” stated RPM chairman and CEO Frank C. Sullivan. “As a result, while our fourth-quarter adjusted diluted earnings per share were below last year’s all-time high levels, they were still our second best on record.”

“RPM’s consolidated sales decline of 8.9% for the quarter reflected the impact of Covid-19 which, to various degrees, interrupted our manufacturing and distribution operations, as well as the maintenance, repair and construction activities of our customers around the world. On a geographic basis, our sales were essentially flat in the U.S., where construction and hardware channels were deemed essential, but were down about 25% in international markets, where these industries were halted to control the spread of the virus. Our better-than-expected top-line results were largely driven by growing demand in the U.S. for our Consumer Group’s small project paints, caulks, sealants, repair products, wood stains and specialty cleaners. The segment experienced record demand for these products via e-commerce retailers, as well as the online portals and brick-and-mortar stores of its DIY home improvement retail partners. The Consumer Group’s strong performance relative to our other segments underscores the benefit of our operating company portfolio, which is strategically balanced between consumer and industrial businesses,” continued Sullivan.

“Over the course of the pandemic, we have remained focused on protecting the health and well-being of our associates and their family members. We instituted comprehensive safety protocols to keep our employees healthy in the workplace, while allowing associates whose jobs can effectively be performed remotely to do so,” stated Sullivan. “During the quarter, a number of our plants around the world were temporarily closed due to Covid-19, either because of government mandates or for disinfecting and cleaning. Thanks to our associates’ efforts to follow our protocols, nearly all of our manufacturing facilities have been open and operational since our fiscal year end.”

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Fourth-Quarter Consolidated Results

Fiscal 2020 fourth-quarter net sales were $1.46 billion compared to the $1.60 billion reported in the year-ago period, or a decline of 8.9%. Net income was $109.3 million compared to net income of $133.4 million in the prior-year period. Diluted earnings per share (EPS) were $0.84 compared to diluted EPS of $1.02 in the year-ago quarter. Income before income taxes (IBT) was $146.9 million compared to $176.9 million reported in the same period last fiscal year. RPM’s consolidated earnings before interest and taxes (EBIT) were $169.8 million compared to $204.6 million reported in the fiscal 2019 fourth quarter.

The fourth quarter included restructuring and other charges of $43.8 million during fiscal 2020 and $36.8 million in fiscal 2019 that are not indicative of RPM’s ongoing operations. Excluding these charges, RPM’s adjusted EBIT was $213.6 million compared to $241.4 million during the year-ago period, or a decline of 11.5%. The company has excluded the impact of all gains and losses from marketable securities from adjusted EPS, as their inherent volatility is outside of management’s control and cannot be predicted with any level of certainty. These investments resulted in a net after-tax loss of $1.9 million for the fourth quarter of fiscal 2020 and a net after-tax loss of $1.7 million during the same quarter last year. Excluding the restructuring and other adjustments, as well as investment losses, fiscal 2020 fourth-quarter adjusted diluted EPS declined 8.9% to $1.13 compared to $1.24 in fiscal 2019.

“The decline in adjusted diluted EPS was equivalent to the decrease in sales, illustrating our quick response to protect margins by reducing costs during the economic downturn, as well as the ongoing success of our MAP to Growth operating improvement program,” stated Sullivan. “Covid-19 safety protocols limited travel and access to our facilities, which slowed some of the manufacturing improvement and ERP consolidation activities that are part of our MAP to Growth program. However, in response to the economic downturn created by the pandemic, we quickly took proactive measures to accelerate the MAP to Growth program’s cost-reduction initiatives with a focus on delayering management and other areas of administration. We have also focused on generating cash flow and maintaining liquidity.”

Fourth-Quarter Segment Sales and Earnings

Construction Products Group net sales were $472.4 million during the fiscal 2020 fourth quarter, which was a decline of 15.6% compared to fiscal 2019 fourth-quarter net sales of $559.6 million, reflecting a decline in organic growth of 13.9%, while acquisitions contributed 0.7% to sales. Foreign currency translation reduced sales by 2.4%. Segment IBT was $70.4 million compared to $82.4 million a year ago. EBIT was $72.4 million versus EBIT of $83.8 million in the fiscal 2019 fourth quarter. The segment incurred $5.0 million in restructuring and other expenses during the fourth quarter of fiscal 2020 and $4.1 million in restructuring-related expenses during the same period of fiscal 2019. Excluding these charges, fiscal 2020 fourth-quarter adjusted EBIT was $77.3 million compared to adjusted EBIT of $87.9 million reported during the year-ago period, representing a decline of 12.1%.

“The point of strength in our Construction Products Group was its U.S. roofing business, which achieved good top- and bottom-line growth. Because roofing projects are completed outdoors and do not require entry into customers’ facilities, we were able to continue with limited interruption from the pandemic,” stated Sullivan. “Overall, the segment fared better in the U.S., where construction was generally deemed

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an essential industry and continued to operate with moderate disruption versus certain international markets, where construction was not considered essential and resulted in significant sales declines for the quarter. International results were further affected by currency headwinds. While the segment’s sales declined during the quarter, earnings declined at a lesser rate, due largely to our operating improvement plan, which included the consolidation of two manufacturing facilities, and proactive measures taken to trim expenses.”

Performance Coatings Group net sales were $235.1 million during the fiscal 2020 fourth quarter, which declined by 20.2% versus net sales of $294.5 million reported a year ago. Organic sales declined 18.3%, while acquisitions contributed 0.2%. Foreign currency translation reduced sales by 2.0%. Segment IBT was $18.7 million compared to $32.4 million reported a year ago. EBIT was $18.7 million compared to $32.5 million in the fiscal 2019 fourth quarter. The segment reported fourth-quarter restructuring-related charges and acquisition costs of $4.9 million in fiscal 2020 and restructuring-related and other charges of $2.2 million in fiscal 2019. Adjusted EBIT, which excludes these charges, was $23.7 million during the fourth quarter of fiscal 2020 compared to adjusted EBIT of $34.7 million during the year-ago period, representing a decline of 31.9%.

“The leadership at our Performance Coatings Group quickly took action to respond to the pandemic-induced economic downturn by delayering management and aggressively reducing fixed costs, particularly in the parts of the business that serve the energy industry and other affected sectors,” stated Sullivan. “This segment also performed better in the U.S. than internationally. Some of the primary customers for its flooring business, such as those in food, beverage, healthcare and pharmaceuticals, were classified as essential but have limited contractor access to their facilities in order to reduce the spread of Covid-19. Although segment sales declined, earnings did not decrease as much as would be expected on a decremental basis. This was a result of the operating improvements that were implemented as part of our MAP to Growth program.”

Consumer Group net sales were $616.2 million during the fourth quarter of fiscal 2020, an increase of 6.7% compared to net sales of $577.5 million reported in the fourth quarter of fiscal 2019. Organic sales increased 7.7%. Foreign currency translation reduced sales by 1.0%. Consumer Group IBT was $74.6 million compared to $99.4 million in the prior-year period. EBIT was $74.7 million compared to $99.5 million in the fiscal 2019 fourth quarter. The segment incurred restructuring-related expenses of $29.8 million during the fiscal 2020 fourth quarter and $9.3 million during fiscal 2019. Excluding these charges, fiscal 2020 fourth-quarter adjusted EBIT was $104.5 million compared to adjusted EBIT of $108.8 million reported during the prior-year period, or a decline of 4.0%.

“Our Consumer Group had very strong top-line growth in the U.S., with sales up 12% as home improvement retailers and hardware stores remained open and consumers gained additional time for home improvement, maintenance and repair projects because of stay-at-home orders across the country. International markets struggled due to stricter lockdown orders with retail channels shut down or only offering online orders or curbside pickup,” stated Sullivan. “The decline in earnings resulted from increased expenses necessary to operate during the pandemic, including extra safety costs and escalating supply chain expense associated with spiking e-commerce orders. These costs were not passed along to customers because we view them as temporary. As part of our MAP to Growth program we closed a manufacturing plant in Australia, which will benefit our bottom line in the coming quarters.”

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The Specialty Products Group reported net sales of $135.2 million during the fourth quarter of fiscal 2020, which declined by 20.3% compared to net sales of $169.7 million in the fiscal 2019 fourth quarter. Organic sales decreased 23.1%, while acquisitions contributed 3.6% to sales. Foreign currency translation reduced sales by 0.8%. Segment IBT was $2.9 million compared with $20.0 million in the prior-year period. EBIT was $3.0 million compared to $19.9 million in the fiscal 2019 fourth quarter. The segment reported fourth-quarter restructuring-related charges of $4.4 million in fiscal 2020 and restructuring-related and other charges of $6.3 million in fiscal 2019. Adjusted EBIT, which excludes these charges, was $7.3 million in the fiscal 2020 fourth quarter, a decline of 72.0% compared to adjusted EBIT of $26.2 million in fiscal 2019.

“The Specialty Products Group, which accounted for 9% of the quarter’s consolidated sales, was challenged because of struggles in the OEM markets it serves with its wood coatings, powder coatings, fluorescent pigments and other products,” Sullivan stated. “For example, the furniture and marine distribution channels that the segment serves were closed for an extended period in the U.S. because they were not classified as essential industries.”

Full-Year Consolidated Results

Fiscal 2020 full-year net sales were $5.51 billion, or down 1.0% compared to $5.56 billion during fiscal 2019. Organic sales declined 0.8%, while acquisitions added 1.1%. Foreign currency translation reduced sales by 1.3%. Net income was $304.4 million, an increase of 14.2% compared to $266.6 million in fiscal 2019. Diluted EPS increased 16.4% to $2.34 versus $2.01 a year ago. IBT was $407.8 million compared to $339.8 million reported in fiscal 2019. EBIT was $499.0 million, an increase of 13.0% versus the $441.5 million reported last year.

Fiscal 2020 and 2019 included restructuring and other charges of $121.3 million and $126.0 million, respectively. Excluding those charges in both years, RPM’s adjusted EBIT was up 9.3% to $620.3 million compared to adjusted EBIT of $567.5 million last year. Investments resulted in a net after-tax gain of $1.1 million during fiscal 2020 and an after-tax loss of $7.7 million last year. Excluding the restructuring and other charges, as well as investment gains and losses, adjusted diluted EPS for fiscal 2020 increased 13.3% to $3.07 compared to $2.71 in fiscal 2019.

Full-Year Segment Sales and Earnings

Construction Products Group fiscal 2020 full-year sales were $1.88 billion, a decrease of 1.0% compared to $1.90 billion during fiscal 2019. Organic sales decreased 1.1%, while acquisitions added 1.9%. Foreign currency translation reduced sales by 1.8%. IBT was $209.7 million versus year-ago IBT of $178.8 million. Segment EBIT was $217.9 million, an increase of 16.4% over EBIT of $187.2 million in fiscal 2019. The segment incurred restructuring and other expenses of $14.2 million during fiscal 2020 and $14.2 million during fiscal 2019. Excluding these charges, fiscal 2020 adjusted EBIT increased 15.3% to $232.1 million from $201.4 million reported for fiscal 2019.

Performance Coatings Group fiscal 2020 full-year sales declined by 4.9% to $1.08 billion from $1.14 billion during fiscal 2019. Organic sales decreased 3.7%, while acquisitions added 0.4%. Foreign currency translation reduced sales by 1.6%. IBT was $102.3 million versus year-ago IBT of $77.4 million. Segment EBIT was $102.3 million, an increase of 31.4% over EBIT of $77.9 million during

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fiscal 2019. The segment reported restructuring-related charges and acquisition costs of $19.4 million in fiscal 2020 and restructuring, acquisition and other charges of $36.0 million in fiscal 2019. Adjusted EBIT, which excludes these charges, increased 6.9% to $121.8 million during fiscal 2020 from adjusted EBIT of $113.9 million during the prior year.

In the Consumer Group, fiscal 2020 sales were up 4.7% to $1.95 billion from $1.86 billion during fiscal 2019. Organic sales increased 5.1%, while acquisitions added 0.5%. Foreign currency reduced sales by 0.9%. IBT was $198.0 million compared to year-ago IBT of $217.4 million. Consumer Group fiscal 2020 EBIT was $198.3 million compared to $218.0 million reported a year ago. The segment incurred restructuring-related expenses of $54.7 million during fiscal 2020 and $12.9 million during fiscal 2019. Excluding these charges, fiscal 2020 adjusted EBIT was $253.0 million, an increase of 9.6% over adjusted EBIT of $230.9 million reported during the prior period.

Specialty Products Group fiscal 2020 sales were $601.0 million compared to $670.2 million a year ago, representing a decline of 10.3%. Organic sales decreased 11.4%. Acquisitions added 1.7%, while foreign currency translation reduced sales by 0.6%. IBT was $57.9 million versus year-ago IBT of $86.0 million. Fiscal 2020 EBIT in the segment was $58.0 million versus $85.6 million in the same period a year ago. The segment reported restructuring-related charges and acquisition costs of $18.7 million in fiscal 2020 and restructuring-related and other charges of $15.9 million in fiscal 2019. Adjusted EBIT, which excludes these charges, was $76.7 million in fiscal 2020, a decrease of 24.5% versus $101.5 million in fiscal 2019.

Cash Flow and Financial Position

For fiscal 2020, cash from operations was a record $549.9 million compared to $292.9 million during fiscal 2019. Capital expenditures during fiscal 2020 of $147.8 million compare to $136.8 million in fiscal 2019. Total debt at the end of fiscal 2020 was $2.54 billion compared to $2.53 billion a year ago. RPM’s net (of cash) debt-to-total capitalization ratio was 65.2% compared to 62.1% at May 31, 2019. RPM’s total liquidity at May 31, 2020, including cash and committed revolving credit facilities, was $1.28 billion.

“RPM’s cash flow was outstanding and reached a record, driven largely by good working capital management and margin improvement initiatives,” stated Sullivan.

Business Outlook

“After an interruption in our sales and earnings growth momentum due to lockdowns at the end of last fiscal year, for the first quarter we expect to resume the growth typical of recent quarters. Our fiscal 2021 first-quarter outlook is for net sales growth in low single digits and adjusted EBIT growth of 20% or more. After bottoming out in April and May, business has been trending better in the first quarter as many markets have re-opened,” stated Sullivan.

“Looking ahead to the full year of fiscal 2021, we anticipate our Construction Products Group and Performance Coatings Group could experience sales declines for the first three quarters and then turn positive in the fourth quarter. Our Consumer Group has continued its sales momentum into fiscal 2021. The Specialty Products Group is expected to face negative sales comparisons during the first two

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quarters, which should turn positive on the back half,” stated Sullivan. “These sales projections are based on the assumption that we do not experience a second wave of lockdowns related to Covid-19. Given the unprecedented volatility in our recent monthly sales and continued economic uncertainty related to the length and severity of the Covid-19 health crisis, we are not providing earnings guidance at this time for the full year of fiscal 2021.”

“We remain laser-focused on advancing our MAP to Growth program and managing our businesses to drive efficiency. We continue to identify numerous opportunities for self-improvement and remain on track to reach our targeted $290 million in annualized savings over the course of the program,” stated Sullivan.

Webcast and Conference Call Information

Management will host a conference call to discuss these results beginning at 10:00 a.m. EDT today. The call will be webcast, both live and as a replay, and can be accessed via the RPM web site at www.RPMinc.com.

The teleconference can be accessed by dialing 833-644-0685 or 918-922-6761 for international callers. Participants are asked to call the assigned number approximately 10 minutes before the 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 teleconference, a replay will be available from approximately 1:00 p.m. EDT on July 27, 2020 until 1:00 p.m. EDT on August 3, 2020. The replay can be accessed by dialing 855-859-2056 or 404-537-3406 for international callers. The access code is 8294392.

About RPM

RPM International Inc. owns subsidiaries that are world leaders in specialty coatings, sealants, building materials and related services. The company operates across four reportable segments: consumer, construction products, performance coatings and specialty products. RPM has a diverse portfolio with hundreds of market-leading brands, including Rust-Oleum, DAP, Zinsser, Varathane, Day-Glo, Legend Brands, Stonhard, Carboline, Tremco and Dryvit. From homes and workplaces, to infrastructure and precious landmarks, RPM’s brands are trusted by consumers and professionals alike to help build a better world. The company employs approximately 15,000 individuals worldwide. Visit www.rpminc.com to learn more.

For more information, contact Russell L. Gordon, vice president and chief financial officer, at 330-273-5090 or rgordon@rpminc.com.

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Use of Non-GAAP Financial Information

To supplement the financial information presented in accordance with Generally Accepted Accounting Principles in the United States (“GAAP”) in this earnings release, we use EBIT, adjusted EBIT and adjusted earnings per share, which are all non-GAAP financial measures. EBIT is defined as earnings (loss) before interest and taxes, with adjusted EBIT and adjusted earnings per share provided for the purpose of adjusting for one-off items impacting revenues and/or expenses that are not considered by management to be indicative of ongoing operations. We evaluate the profit performance of our segments based

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on income before income taxes, but also look to EBIT as a performance evaluation measure because interest expense is essentially related to acquisitions, as opposed to segment operations. For that reason, we believe EBIT is also useful to investors as a metric in their investment decisions. EBIT should not be considered an alternative to, or more meaningful than, income before income taxes as determined in accordance with GAAP, since EBIT omits the impact of interest and investment income or expense in determining operating performance, which represent items necessary to our continued operations, given our level of indebtedness. Nonetheless, EBIT is a key measure expected by and useful to our fixed income investors, rating agencies and the banking community all of whom believe, and we concur, that this measure is critical to the capital markets’ analysis of our segments’ core operating performance. We also evaluate EBIT because it is clear that movements in EBIT impact our ability to attract financing. Our underwriters and bankers consistently require inclusion of this measure in offering memoranda in conjunction with any debt underwriting or bank financing. EBIT may not be indicative of our historical operating results, nor is it meant to be predictive of potential future results. See the financial statement section of this earnings release for a reconciliation of EBIT and adjusted EBIT to income before income taxes, and adjusted earnings per share to earnings per share. We have not provided a reconciliation of our first-quarter fiscal 2021 adjusted EBIT and adjusted earnings per share guidance, because material terms that impact such measures are not in our control and/or cannot be reasonably predicted, and therefore a reconciliation of such measures is not available without unreasonable effort.

Forward-Looking Statements

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 and metal 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) the timing of and the realization of anticipated cost savings from restructuring initiatives and the ability to identify additional cost savings opportunities; (j) risks related to the adequacy of our contingent liability reserves; and (k) risks relating to the recent outbreak of the coronavirus (Covid-19); and (l) 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, 2019, 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

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SUPPLEMENTAL SEGMENT INFORMATION

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SUPPLEMENTAL INFORMATION

RECONCILIATION OF “REPORTED” TO “ADJUSTED” AMOUNTS

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CONSOLIDATED BALANCE SHEETS    

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CONSOLIDATED STATEMENTS OF CASH FLOWS

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