Tremco CPG Acquires German Aluminum Roofing Firm Kalzip

Acquisition expands Tremco's building envelope solutions portfolio globally.

Apr. 1, 2026 at 1:08pm

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Tremco Construction Products Group (Tremco CPG), a subsidiary of RPM International Inc., has completed the acquisition of Kalzip GmbH, a German-based global leader in the design and production of aluminum-based roofs and facades for building envelopes. The acquisition will allow Tremco CPG to expand its aluminum building systems offerings in North America and globally.

Why it matters

The acquisition aligns with Tremco CPG's strategy of offering a comprehensive, integrated approach to modern construction by combining Kalzip's innovative aluminum technologies with Tremco's existing portfolio of roofing, waterproofing, and other building envelope solutions. This will enable Tremco to deliver more customizable, high-performance building envelope systems to customers worldwide.

The details

Kalzip, founded in 1986 and based in Koblenz, Germany, specializes in lightweight, weather-resistant and flexible aluminum roof systems, as well as advanced facade technologies. The company's cutting-edge manufacturing capabilities have delivered over 1.2 billion square feet of aluminum solutions globally for major projects like the LAX Metro Station and the Louisiana Superdome. In North America, Kalzip's aluminum products will eventually be integrated into Tremco's existing brand portfolio, while maintaining the Kalzip brand in other global markets.

  • Tremco CPG announced the successful acquisition of Kalzip on April 1, 2026.
  • The acquisition followed the completion of the standard regulatory review process.

The players

Tremco Construction Products Group (Tremco CPG)

A subsidiary of RPM International Inc. that unites industry-leading building envelope solutions manufacturers and trusted brands.

Kalzip GmbH

A global leader in the design and production of aluminum-based roofs and facades for building envelopes, founded in 1986 and based in Koblenz, Germany.

Scottie Stinson

President of Tremco CPG Inc.

RPM International Inc.

The parent company of Tremco CPG that owns subsidiaries that are world leaders in specialty coatings, sealants, building materials and related services.

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What they’re saying

“In addition to expanding our business across Europe, India and other regions around the world where Kalzip already has a strong presence, this acquisition will eventually allow Tremco CPG to market a wider range of aluminum building envelope options to our North American customer base.”

— Scottie Stinson, President, Tremco CPG Inc.

“Our global reach, complementary product portfolios and customizable solutions will enable Kalzip, as part of Tremco CPG, to deliver tailored, high-performance, end-to-end building envelope systems for varied architectural and restoration needs across diverse markets and large-scale projects.”

— Scottie Stinson, President, Tremco CPG Inc.

What’s next

Tremco CPG plans to integrate Kalzip's aluminum roofing and facade products into its existing North American brand portfolio, while maintaining the Kalzip brand in other global markets. More details on the rebranding process will be shared as it progresses.

The takeaway

The acquisition of Kalzip aligns with Tremco CPG's strategy of offering comprehensive, integrated building envelope solutions to customers worldwide, leveraging innovative technologies and global reach to deliver customized, high-performance systems for diverse architectural and restoration needs.