Paradiene 20 TS P is a high performance, semi-adhered, SBS-modified bitumen base ply designed specifically for use in Parapro roof membrane systems. Paradiene 20 TS P consists of a lightweight random fibrous glass mat impregnated and coated with an elastomeric styrene-butadiene-styrene (SBS) modified bitumen. The unique top surface is factory coated with a proprietary Syntan acrylic coating. The back surface design consists of a factory-applied Syntan coating combined with heat-activated adhesive stripes, which provides for uniform bonding of 50% of the total surface area of the sheet.