Monsey Bakor, Mississauga, Ontario, Canada, a division of Henry Co., offers Perma-Seal FG, a glass-fiber reinforced membrane with a granule surface for skid resistance. It is designed for application under tile, shingles, slate and metal roofing. The flexible rubberized-asphalt membrane is designed for self-adhesive application under primary roofing to provide a water, vapor and air barrier. The membrane is composed of SBS polymer-modified asphalts reinforced with glass fiber or high-strength polyethylene. The membrane is self-sealing around fasteners.