CertainTeed's Flintlastic® Ultra Glass SA is designed for use as a base sheet for modified bitumen roofing systems. It is suitable for use in the construction of various types of membranes for both new construction and reroofing, over a variety of substrates. Flintlastic Ultra Glass SA will provide additional strength, improved handling, pliability, and moisture resistance when used as the first ply over non-nailable and insulated substrates.

Technical Information

CertainTeed Flintlastic Ultra Glass SA is a heavy-duty, self-adhering base sheet with a sanded top surface. This product is designed to be used in 2-ply, 20 year commercial roofing systems with any of our mopped, torched, or cold-adhered polyester-reinforced, granulated cap sheets.

  • Support Mat: Wet process fiber glass mat
  • Top Surface: Fine black mineral particles
  • Weight: 73 lbs. per roll
  • Dimensions: 39-3/8" x 33' 11" (111 sq. ft./roll)
  • Coverage: One Square
  • Thickness: 3.0mm (118 mils)
  • ASTM D1970
  • ASTM D6163, Grade S, Type I

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


CertainTeed's Flintlastic Ultra Glass SA is attached by a self-adhering torch method. It is not intended for attachment with hot asphalt, cold adhesive, coal tar pitch, or mechanical fasteners.

Rolls should be stored upright, off ground, completely protected from the weather. Roof decks shall be structurally sound, dry, and smooth and meet or exceed minimum requirements of the deck manufacturer, local code and CertainTeed. Flintlastic Ultra Glass SA is a self-adhering base sheet featuring a peel-off backing.

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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