Products / StressPly / StressPly FR Mineral

SBS rubber-modified roof membrane with two layers of fiberglass reinforcement in a high penetration index asphalt compound, used as the top ply of a modified built-up roof, the top ply of a two-ply flashing, or for repairs to existing asphalt roofs. Offered as smooth StressPly (120 mil nominal, 100 sq. ft. rolls) and StressPly FR Mineral (145 mil nominal, 75 sq. ft. rolls) with reflective mineral granules and a fire retardant in the compound. Garland states StressPly FR Mineral has a Class A fire rating over a combustible roof deck with minimal underlayment. Hot-applied in asphalt or cold-applied in Weatherking or Green-Lock adhesive; the finished membrane meets or exceeds ASTM D 6163 Type III.