Acquisition strengthens RPM's portfolio of waterproofing solutions

RPM International Inc. (NYSE:RPM) today announced that a definitive agreement has been signed for the acquisition of Volteco S.p.A. (Volteco), an Italy-based leading supplier of below-grade waterproofing solutions, for its Tremco Construction Products Group (Tremco CPG). This strategic acquisition brings a unique and differentiated technology platform to Tremco CPG.

Headquartered in Ponzano Veneto, Italy, Volteco specializes in advanced waterproofing technology with calendar year 2025 sales of €28 million. The company is recognized for its Amphibia^TM waterproofing sheet membrane. Volteco also produces a line of bagged powder goods for patch and repair applications, alongside flexible liquids, mortars, resins and damp-proofing materials.

Volteco's cutting-edge waterproofing solutions have been pivotal in numerous high-profile projects, including the protection of historical landmarks in Venice and the construction of modern facilities like the Santa Giulia Ice Hockey Arena in Milan, a key facility for the Milan Cortina 2026 Winter Olympic Games.

Other notable applications include waterproofing for the strategic public work of an underground tunnel connecting the Abruzzo Regional Citadel to the L’Aquila bus terminal, a hub for intercity connections to over 22 cities in Italy, including Naples and Rome, and ensuring the structural integrity of Y-40, the world’s deepest thermal pool.

The transaction is expected to close in the second quarter of fiscal 2027, subject to customary closing conditions.

"Volteco is an excellent complement to the product lines of our Tremco Construction Products Group," stated Frank Sullivan, RPM chairman and CEO. "This acquisition provides Tremco CPG with new technologies that can be leveraged through its global sales force to drive growth and enhance its 'Power of One' value proposition for customers."

About Tremco Construction Products Group

Tremco Construction Products Group (Tremco CPG), part of the RPM International Inc. portfolio, unites industry-leading building envelope solutions manufacturers and trusted brands—including Tremco, Nudura, Dryvit, Willseal, Flowcrete, Nullifire and Vandex—to deliver comprehensive, integrated construction systems. With operations spanning North America, Europe, Asia-Pacific, India and Latin America, Tremco CPG has a global presence supported by regional businesses and distributors who understand local market needs. Tremco CPG solutions ensure long-lasting performance for commercial, industrial and residential projects worldwide, while international teams collaborate on training, testing and innovation to build high-performing structures in any geography or climate.

About RPM

RPM International Inc. owns subsidiaries that are world leaders in specialty coatings, sealants, building materials and related services. The company operates across three reportable segments: consumer, construction products and performance coatings. RPM has a diverse portfolio of market-leading brands, including Rust-Oleum, DAP, Zinsser, Varathane, The Pink Stuff, Stonhard, Carboline, Finish Works, Tremco, Euclid Chemical, Dryvit and Nudura. 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 17,500 individuals worldwide. Visit www.RPMinc.com to learn more.

For more information, contact Matt Schlarb, Vice President – Investor Relations & Sustainability, at 330-220-6064 or mschlarb@rpminc.com.

Forward-Looking Statements

This press release includes 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 and regional markets and general economic conditions, including uncertainties surrounding the volatility in financial markets, the availability of capital and the viability of banks and other financial institutions; (b) the prices, supply and availability 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 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) changes in global trade policies, including the adoption or expansion of tariffs and trade barriers; (h) 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; (i) risks and uncertainties associated with our ongoing acquisition and divestiture activities; (j) the timing of and the realization of anticipated cost savings from restructuring initiatives, the ability to identify additional cost savings opportunities, and the risks of failing to meet any other objectives of our improvement plans; (k) risks related to the adequacy of our contingent liability reserves; (l) risks relating to a public health crisis similar to the Covid pandemic; (m) risks related to acts of war similar to the Middle East conflict and the Russian invasion of Ukraine; (n) risks related to the transition or physical impacts of climate change and other natural disasters or meeting sustainability-related voluntary goals or regulatory requirements; (o) risks related to our or our third parties' use of technology including AI, data breaches and data privacy violations; (p) the shift to remote work and online purchasing and the impact that has on residential and commercial real estate construction; and (q) 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, 2026, 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 filing date of this press release.

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Matt Schlarb

Vice President – Investor Relations & Sustainability

330-220-6064

mschlarb@rpminc.com.