RapidGRIP Readi-Base SA is a sand surfaced, SBS (Styrene-Butadiene-Styrene) self-adhesive membrane. Manufactured with a fiberglass mat that is saturated and coated with a premium quality, "high tack" asphaltic bitumen that is combined with durable SBS elastomers and protected by a poly release film for easy installation. It is designed for use as a self-adhesive base sheet or interply sheet in conjunction with torch applied or hot asphalt applied modified bitumen roof systems. RapidGRIP is designed as a base sheet over polyisocyanurate such as USP ISO, USP ISO CG, or SecuRock and is ideal for temporary dry-in of roofs or as an underlayment under shingles, tile and slate. May be installed direct to primed or unprimed plywood or oriented strand board as an underlayment. For commercial applications, RapidGRIP Readi-Base can be utilized as a base layer in APP torch applied, SBS torch applied and SBS mop applied assemblies where applicable. Not suited for use as a base sheet in cold applied assemblies.