Mylar® A polyester film is a tough, transparent, flexible general-purpose material ideal for electrical insulation, offering excellent dielectric strength up to 21 kV and insulation resistance across -70°C to 150°C operating temperatures, with a melting point of 254°C. Available in thicknesses from 19 µm to 350 µm (or 48 to 1400 gauge), it features high tensile strength of 175-275 N/mm² longitudinally and transversely, low shrinkage under 1.5% at 150°C, and superior resistance to moisture, chemicals, and aging without brittleness. Its rough surface ensures easy handling, strong adhesion, and processability for electronics, power applications, and barriers.