TRI-PLY ® SBS Granule Membrane (Formerly Tri-Ply® SBS Modified Bitumen) Description Tri-Ply® SBS Granule Membrane is a granule-surfaced modified bitumen membrane manufactured to stringent GAF specifications. Its core is a strong, resilient, non-woven polyester mat that is coated with flexible, SBS polymer-modified asphalt and is surfaced with mineral granules. Uses Tri-Ply® SBS Granule Membrane is designed for new roofing and reroofing applications, as well as flashings.
