Polycab FRLF 1.5 sqmm Blue 90m PVC I nsulated Wire is made of a durable PVC material and is insulated to prevent electrical shock. The Polycab unsheathed industrial cable is a high tension cable. Polycab FR Building wires are insulated with a Fire Retardant (FR) PVC Compound. This FR PVC Compound has a high oxygen and temperature index.