Products / JM APP Base Sheet

JM APP Base Sheet is a fiber glass-reinforced APP modified bitumen base or ply sheet with a fine mineral parting agent for APP multi-ply roofing; it may be used as a backer ply in two-ply flashing systems, and approved cap sheets may be applied to it with cold adhesive. The data sheet (RS-4338, 9-23) says it meets ASTM D6509 and prints a thickness of 90 mil and a roll about 1 m wide by 15 m long covering 145 square feet at 96 lb. It lists a system-dependent Peak Advantage guarantee of up to 30 years.