Consists of aluminium foil coated uniformly with copolymer film on one side or both sides with perfect lamination and is used to separate groups of conductors in telephone cable, preventing interference and cross-talk; it’s used as water barrier and armour in power cables. The copolymer provides excellent adhesion to the aluminium substrate and has the chemical resistance and general characteristics of low-density polyethylene and gives excellent bond strength to all types of polyethylene