CertainTeed Flintlastic® GTA CoolStar® is a polyester mineral surfaced APP cap sheet with reflective CoolStar granules. It is designed for use as a roofing membrane over various types of substrates for both new construction and reroofing installations. It is suitable for most low sloped roof decks and may be used for roof system flashings including wall treatments, base flashings and field flashings.

  • Granulated, uncoated finish
  • Handles like standard product - no special installation requirements 
  • Low maintenance
  • More consistent
  • More aesthetically pleasing

Flintlastic GTA CoolStar meets or exceeds ENERGY STAR® requirements and can be installed to meet the requirements established by California Title 24. Visit www.coolroofs.org or www.energystar.gov for more information.

Technical Information

CertainTeed Flintlastic GTA CoolStar is produced with a high performance, non-woven polyester mat which is impregnated and coated with a superior grade, modified bitumen compound.

  • Top Surface: Highly reflective CoolStar granuals
  • Back Surface: Torchable polyethylene film
  • Weight: 106 lbs. per roll
  • Dimensions: 39-3/8" x 32' 10" (100 sq. ft.)
  • Thickness: 4.0mm (156 mils)
  • Coverage: One square

For additional technical resources please refer to the CertainTeed Commercial Roof Systems Manual.


CertainTeed Flintlastic GTA CoolStar is intended for torch application only and should not be exposed to adhesives or solvent based materials. Rolls should be stored upright, off ground, completely protected from the weather. Roof decks shall be structurally sound, dry, smooth and meet or exceed minimum requirements of the deck manufacturer, local code and CertainTeed.

For additional technical resources please refer to the CertainTeed Commercial Roof Systems Manual or the Application Manual.

Warranty Details

CertainTeed backs its commercial roofing systems with the confidence of three warranty choices:

  • Limited Product Warranty
  • NDL Roof Membrane Limited Warranty*
  • Full System NDL Limited Warranty*

Owners and specifiers who choose the NDL or Full System NDL warranty options have the added security of manufacturer involvement in the sometimes difficult process of contractor qualifying and workmanship inspection. Consult with the roofing contractor and your CertainTeed commercial roofing territory manager to decide which CertainTeed warranty is best for your building or project.

*NDL warranties are not available on all specifications and are only available through CertainTeed Gold and Silver Star Contractors

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