Flintlastic® STA Plus is a premium, APP-modified bitumen, versatile, smooth-surface membrane. 

It is designed for use as a robust base, interply or cap membrane (warranty may require coating) over various types of substrates for both new construction and reroofing installations. 

Flintlastic STA Plus is produced with a high-performance, stress-resistant polyester matt which is impregnated and coated with a superior grade, APP-modified bitumen compound.

Technical Information

CertainTeed Flintlastic STA Plus is produced with a high performance, stress-resistant polyester mat which is impregnated and coated with a superior grade, APP-modified bitumen compound.

  • Support Mat:  High performance, puncture and tear resistant, non-woven polyester mat
  • Top Surface: Smooth, Fine sand, release agent
  • Back Surface: Torchable Polyethylene Film
  • Dimensions: 39 3/8" x 32' 10"
  • Coverage: One Square
  • Thickness: 4.5mm (180 mils)
  • Meets ASTM D6222, Grade S, Type 1


CertainTeed Flintlastic STA Plus 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 detailed installation instructions please refer to the CertainTeed Commercial Roof Systems Specifications.

Warranty Details

CertainTeed offers four low-slope roof system warranty options: Limited Warranty on Materials, Limited Warranty on Systems, No Dollar Limit (NDL) Limited Warranty and Full System 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 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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