Mylar® EL polyester film is a strong, flexible PET insulation material designed for electrical and electronic applications where dielectric strength, thermal stability, and chemical resistance matter. Available in thin gauges from 48 to 500 gauge, it offers reliable handling for coating, die cutting, embossing, and laminating, with thicker EL21 grades for heavy-gauge use in transformers, laminates, bus bars, and punched parts. This durable film provides excellent moisture resistance, high-temperature performance, and good winding characteristics. Its insulating properties support stable capacitance control in compact component designs, while the broad thickness range makes it suitable for space-efficient, high-voltage assemblies.