... products are using inorder to corrosion protection for Oil, Gas, Petrochemical, Water and Waste Water underground Steel ... to any diameters for petroleum, natural gas, water supply, city gas, oil and electric power industries etc. ... : 1. Adhesive: Inner layer of Butyl rubber. 2. Backing: Outer layer of Polyethylene(PE) Plastic. ... tape: T-240 (0.38mm), T-250 (0.51mm), T-265 (0.64mm), T-280 (0.76mm), T-2100 ...