Paradiene 20 TS SA is a uniquely designed, high performance, self-adhesive, modified bitumen base ply designed for use in homogeneous multi-layer modified bitumen roof membrane systems. Paradiene 20 TS SA consists of a lightweight random fibrous glass mat impregnated and coated with an elastomeric styrenebutadiene-styrene (SBS) modified bitumen. The unique back surface design consists of factory applied, self-adhesive stripes combined with a proprietary acrylic coating between the stripes, which provides for uniform bonding of 50% of the total surface area of the sheet.