CertainTeed Flintlastic GTS-FR CoolStar is a premium, SBS modified, heavyweight polyester mineral surfaced 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 roofing installations. It is suitable for most low slope roof applications 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 GTS-FR CoolStar can be used to comply with the 2016 California Title 24 Part 6 Cool Roof Requirements. Visit www.coolroofs.org for more information.

Technical Information

CertainTeed Flintlastic® GTS-FR CoolStar is produced with a high performance, non-woven polyester mat which is impregnated and coated with a superior grade, modified bitumen compound, and surfaced with highly reflective CoolStar Granules.

  • Top Surface: Highly reflective CoolStar granules
  • Back Surface: Torchable polyethylene film
  • Dimensions: 39 3/8" x 32' 10" (100 sq. ft.)
  • Thickness: 4.0mm (157 mils)
  • Coverage: 1 square
  • ASTM D6164, Grade G, Type II

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


CertainTeed Flintlastic® GTS-FR 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 fro 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 installation details, please refer to the CertainTeed Roof Systems Manual or the Flintlastic Application Manual.

For Construction Details and Specs Click Here

Warranty Details

CertainTeed offers three asphaltic low-slope roof system warranty options: Limited Warranty on Materials, Integrity Roof System Limited Warranty, and Integrity Roof System No Dollar Limit (NDL) Limited Warranty. CertainTeed warranty durations are based on a combination of system specification and product selection. Please download an overview of these warranty options for details. Consult with your contractor or CertainTeed Territory Manager to determine which warranty is best for your project.     

CertainTeed offers standard asphaltic low-slope roof system warranty durations between ten and twenty-five years. Additionally, Gold Star Contractors can increase warranty durations by 25% by engaging in an Integrity Maintenance Agreement with their client.

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