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CertainTeed's workhorse granulated, mop-applied, SBS-modified bitumen cap sheet, Flintlastic® GMS, is valued for its high elasticity and decades of consistent quality. This 145 mil membrane is manufactured with a resilient polyester reinforcement, offering exceptional durability and resistance to weathering. GMS is available in three true-blend colors designed to complement popular shingles. Face it - some old dogs don’t need new tricks, and CertainTeed hot asphalt and cold adhesive low-slope roof systems have consistently delivered on the promise of protection for generations. These systems offer multiple watertight layers with unparalleled bond strength. So when the risk of a roof leak means more than just a maintenance nuisance, trust what works and spend the time to install peace-of-mind. Reach out to your local CertainTeed Territory Manager to request a sample and demonstration of Flintlastic® GMS.

Features & Benefits

Quick Specs
• SBS-modified • Polyester reinforcement • 93 lbs • 1 Square • 3.7 mm (145 mils)
• Meets or exceeds ASTM D6164 Grade G, Type I • Pliable even in cold temperatures • Excellent elongation/recovery
Why Buy
• Tried and true modified bitumen protection
• Standard asphaltic membrane warranty durations between ten and twenty-five years • Credentialed Contractors can increase warranty durations by 25% with an Integrity Maintenance Agreement • Product and Product/Workmanship options: Limited Warranty on Materials, Integrity Roof System® Limited Warranty, and Integrity Roof System No Dollar Limit (NDL) Limited Warranty Warranty durations are based on a combination of system specification and product selection.

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