

This product is manufactured from a high strength polyester-reinforced mat that is saturated and coated with SBS modified bitumen to a thickness of 2.5 mm (98 mils). The sheet is top surfaced with a thin layer of polyfilm, which disappears upon heat welding of the cap sheet. Bottom surfacing has a film to prevent sticking in the roll. A double release self adhesive selvedge, incorporating a highly adhesive SBS coating, is provided for complete self-adhesive lap seaming.