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Complete roofing and waterproofing solutions

Siplast is the industry leader in the development and manufacture of advanced, high-performance roofing and waterproofing systems. In the 1960s, working with Shell Chemical of Europe, Siplast developed SBS-modified bitumens in response to the changing requirements of modern construction. We have always understood that certain times and unique situations call for different and evolving solutions. That's why we also offer PMMA liquid resin products, single-ply systems, vegetated and reflective white roof systems, reroofable lightweight insulating concrete roof insulation, and a host of other systems. Siplast is with you every step of the way to ensure your project vision fulfills the positive ways you want your work to impact the world.

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Space Needle

Siplast project stories

From schools, manufacturing facilities, and hospitals to museums and convention centers, we partner with you every step of the way to make your project vision a reality. Read some of our standout project stories here.

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Siplast fast facts

Our story is one of uncompromising quality, innovation, partnership, and commitment to our customers and their communities.

Take a look at what has made that story possible.

Kicked off a roofing revolution with SBS-modified bitumens

Styrene-butadiene-styrene modified bitumens — the product of our 1960s research partnership with Shell Chemical of Europe — helped modern design professionals rise to new and visionary building challenges across the globe.

Certificates of Analysis provide an indisputable assurance of quality

Siplast Certificates of Analysis are available upon request to provide assurance that your Siplast products meet or exceed our high manufacturing standards.

Helped build the world's largest "living" roof with the Ford Motor Company

In 2004, The Guiness Book of Records recognized the 10.4-acre Ford Truck Plant vegetated roof as the world's biggest, helping realize the Ford company vision of balancing lean manufacturing with meeting its environmental goals.

Renovated the iconic Seattle Space Needle — without closing to visitors!

Siplast helped renovate the observation deck of the beloved 57-year-old world icon without interruption to visitors.

Meet Your Siplast Partners
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Meet Your Siplast Partners

At Siplast, we never stop working to be your trusted partner. Meet some of the people who will be with you every step of the way.

The RISE Center: Tensile Testing for SBS-Modified Bitumen

The RISE Center: Tensile Testing for SBS-Modified Bitumen

Watch how SBS-modified bitumen roofing materials are tested to determine how they perform over their lifetime.

Eco-Activ SBS rolled sheet contractors

About us

The Siplast story began in the late 1960s with a game-changing innovation: the development of SBS (styrene-butadiene-styrene) modified bitumens in partnership with Shell Chemical of Europe. Since then, Siplast has worked closely with our clients to apply trusted, high-performance Siplast Engineered Roofing and Waterproofing Systems — including SBS-modified bitumen, polymethyl methacrylate (PMMA) liquid resin, as well as vegetated roof systems - across all types of deck construction in the varied (and sometimes extreme!) weather conditions of 40+ countries.
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