Mylar® WC polyester film is a general-purpose electrical grade PET insulation designed for wire and cable core wrap applications in telecommunications and power transmission. It combines excellent dielectric strength with strong tensile durability, low shrinkage, low moisture absorption, and good resistance to moisture, chemicals, and heat for reliable performance in demanding environments. Available in thicknesses from 0.48 to 5 mil, it offers outstanding cut-through resistance and stable dimensional control for consistent processing. With UL-recognized construction and high thermal durability, Mylar WC provides dependable insulation where mechanical strength, flexibility, and long-term electrical performance are critical.