CertainTeed and GCP, part of the Saint-Gobain Group, introduce their new integrated commercial waterproofing system that protects all six sides of a building. The new holistic system will be unveiled at the 2023 IIBEC Convention and Tradeshow, March 3-6, at Booth #929.

“As two leading inventors and innovators of commercial building envelope solutions, we are pleased to combine CertainTeed’s and GCP’s trusted waterproofing products to form one unparalleled waterproofing system for our customers,” said CertainTeed Commercial Roofing Senior Product Manager Abby Feinstein. “From the foundation, to the walls, to the roof and the tie-ins to each, this comprehensive system protects every detail of a building to deliver one trusted waterproofing solution. We are excited to showcase it at the 2023 IIBEC Convention and Tradeshow.”

Commercial structures need proven waterproofing products and expertise to avoid critical damage and preserve structural integrity. The new waterproofing system provides both by bringing together two industry leaders. GCP is the inventor of the below-grade pre-applied waterproofing category and CertainTeed has been innovating the building products industry for more than 115 years, together their combined products and expertise forms one water-tight solution for all six sides of a structure. The waterproofing system features:

  • Below Grade Waterproofing: PREPRUFE® pre-applied and post-applied waterproofing membranes fully bond to concrete and are trusted in some of the most iconic buildings worldwide with over 25 years of tried-and-tested performance.
  • Air Barriers: PERM-A-BARRIER® air barrier and flashing products protect structural components from damage caused by uncontrolled airflow and associated moisture. They are available in sheet, liquid, permeable and impermeable options.
  • Elevated Deck Waterproofing: SILCOR® liquid waterproofing forms a fully bonded membrane resisting lateral water migration. It coats tight spaces through spray application and cures in hours to keep schedules on track.
  • Low-Slope Roofing Solutions: Flintlastic® low slope roof systems complete the building envelope offering protection, including fire resistance and solar reflectivity. And, SMARTCOAT® roof restoration systems are cost-effective, sustainable solutions when a new/reroof is not needed. 


The GCP and CertainTeed waterproofing system is backed by the companies’ commitment to sustainability and building science expertise, while delivering cohesive high-performance products. Together the companies are committed to translate cutting-edge science into solutions for their customers.