Three lab technicians in RISE Center coats inspecting a sample, representing Siplast's advanced roofing and waterproofing solutions.
OVERVIEW

About Us

Siplast is an innovator in the development and manufacture of advanced, high-performance roofing, waterproofing, and other built environment solutions.

We build trust to solve your toughest challenges

We are committed to partnering with you at every step of the process, from project planning to installation and beyond, to provide solutions and help make your project vision a reality.

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Our partnership philosophy

Regardless of the size or scope of the job, the first thing we build is an effective partnership. We are with you every step of the way.
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Leading with innovation

Siplast developed SBS-modified bitumens—which provide exceptional elongation and recovery properties over a wide range of temperatures—in the 1960s.
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Building solutions that meet unique requirements

We manufacture more than 100 products with advanced physical and mechanical properties that can be incorporated in the overall system to meet almost any performance specification.

With you every step of the way

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Close-up of a microscope viewing a sample, symbolizing leading innovation in SBS roofing technology and product testing.

Leading innovation with pioneering products

  • Creators of SBS roofing technology
  • Debuted PMMA in North America
  • Testing the future of roofing & waterproofing technologies
Explore milestones

Project profiles

Explore our projects
David L. Lawrence Convention Center green roofing and waterproofing solutions from Siplast

David L. Lawrence Convention Center

A few years after the structure was completed, the roof terraces had been plagued with persistent leaks and water intrusion issues. Rather than repairing the damage, DLCC ownership took the opportunity to redesign the roof terraces. The goal was to resolve the existing issues, while also creating an inviting outdoor space where convention attendees could step outside, connect with nature, and enjoy a biophilic break.
View DLCC project Explore intensive vegetated roofs
Space Needle in the Seattle skyline

Space Needle

Updating and preserving the 57-year-old Space Needle’s observation deck meant more than just resurfacing — it required a system that could handle structural movement from wind and temperature, perform in Seattle’s rainy climate, and allow it to remain open to the public throughout the duration of the renovation. Therefore, the solution needed to meet the project’s aesthetic, structural, and scheduling demands all at once.
View Space Needle project Explore waterproofing solutions
United Nations General Assembly in New York City

United Nations - General Assembly

Protecting a world-renowned facility. Reroof the iconic UN General Assembly Building - the original roof was past its useful service life. Help facilitate the uninterrupted operation of the UN General Assembly Hall, the heart of the building's internationally-critical operations.
View General Assembly project Explore roofing solutions
Jacob K Javits Convention Center in New York City

Jacob K. Javits Convention Center

The Jacob K. Javits Convention Center in New York City was in need of a multi-faceted reroofing solution. The project's goals included addressing existing leaks and helping realize the client's vision of becoming a role model for environmental leadership to the exhibition industry globally.
View Javits project Explore vegetated roofing solutions
Maple Leaf Gardens Arena in Canada

Maple Leaf Gardens

Replacing - and preserving - an iconic Toronto dome. The building owners were seeking a solution that would not only match the original aesthetics, but that could also help them meet their environmental objectives.
View Maple Leaf project View roofing solutions

Our leadership team

View our leadership team

In good company

Our industry affiliations

AIA logo.
ARC US logo.
Greenbuild International Conference and Expo logo.
Western States Roofing Contractors Association logo.
Air Barrier Association of America (ABAA) logo.
International Institute of Building Enclosure Consultants logo.
Abstract blue overlay of a statue and cityscape, representing Siplast's partner relationships and technical service. Abstract red overlay of people at a table, symbolizing collaboration and career opportunities at Siplast.

Join Siplast!

At Siplast, we never stop working with our clients to be their trusted partner. From new products that offer expanded solutions to enhancing our level of service, we are dedicated to working with our partners every step of the way. Does this sound like you? If yes, explore our career opportunities here!
View open positions
RESOURCES

RISE Center: See the science for yourself

RISE is our acronym for Research, Innovate, Support, and Evolve. And the Siplast RISE Center is where scientists and engineers work together on improving roofing and waterproofing technology.

RISE Center visitors get hands-on experience with Siplast products, attend accredited technical presentations, and interact with our innovators at the front line.

Discover the RISE Center