The specification of the tape consists of two layers, adhesive layer and film backing Adhesive: butyl rubber Outer layer: Special blend of stabilized polyethylene Heavy duty adhesive Resistant to UV Can be applied over a wide temperature range Good conformability and consistent uniform thickness Easily applied with no special equipment Conformable to irregular shapes. Meets ASTM D 1000 Standard Cold applied Item T-380 Total thickness (mm) 0.76 Backing thickness (mm) 0.30 Adhesive thickness (mm) 0.46 Tensile strength (N/ cm) ≥60 Elongation (%) ≥450 Adhesion to Prime Pipe (N/cm) Dielectric Strength (KV/cm) 42 Volume Resistivity (Ω.m) ≥2.5x1012 Water Vapor Transmission Rate (24h)g/㎡ ≤0.1 Water Absorptivity (%) ≤0.1 UV Resistance 600h ≥80 %