204-3HD is a 4.5 mil, skived & tensilized PTFE film that is coated with "high temperature" silicone adhesive. The tensilized film provides higher tensile strength, lower elongation and higher dielectric strength than regular skived film. Those products are used primarily in electrical appliances such as coil wraps and separators, transformer, slot liners and harness wrapping where good insulation and heat resistance are needed. There are also used in mechanical applications requiring high temperature resistance and a non-stick surface such as roll protection in flat die extrusion.