Flintlastic GMS, White - Mop Applied (1Sq)
Flintlastic Gms White(1Sq) (MoDisclaimer:
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Product Overview
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.
Key Features
- SBS-modified
- Polyester reinforcement
- Meets or exceeds ASTM D6164 Grade G, Type I
- Pliable even in cold temperatures
- Excellent elongation/recovery
Product Specifications
Area |
100 Sq. Ft. per Roll |
Brand |
Certainteed |
Color |
White |
Length |
32' 10" |
Thickness |
145 mil (3.7 mm) |
Weight |
93 Lbs. per Roll |
Width |
39-3/8 in |
Flintlastic GMS White is an approved ENERGY STAR® product for slopes greater than 2"/12".

