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CertainTeed's Flintlastic® Base 20 T is a robust torch-applied SBS-modified bitumen base sheet, delivering the benefits of a homogenous roof system when paired with SBS-modified bitumen cap sheets such as Flintlastic® GTS-FR. Many members of the design and specification community prefer multi-layer modified bitumen roof systems constructed with the same polymer-modified material and application methodology for base and/or interply and cap sheets, to optimize stress resistance to the roof system with materials expanding and contracting at the same rate. This 120 mil base sheet is manufactured with a heavy duty, dimensionally stable fiberglass reinforcement that is highly resistant to tearing and punctures. The fiberglass mat is saturated and coated with an SBS-modified asphalt blend with elastic, waterproofing and fire-resistant properties. Flintlastic® Base 20 T is torch-applied, mitigating roof penetrations and allowing for extended warranty durations. Reach out to your l...See More

Features & Benefits

Quick Specs
• SBS-modified base ply, torch-applied • Fiberglass reinforcement • 80 lbs. • 1 Square • 3.0 mm (120 mils)
• Meets or exceeds ASTM D6163, Grade S, Type I and D4601, Type II • Pliable even in cold temperatures • Excellent elongation/recovery
Why Buy
• Projects where torch-applied SBS-modified bitumen roof system is preferred or specified • Tried and true modified bitumen protection • Robust base ply allows for extended warranties
• 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.
Three rolls of Flintlastic Base 20 T on a white background.

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