Standard PTFE Coated Fiberglass, with Liner, 3 mil. PTFE Coated Fiberglass fabric impregnated with PTFE dispersion and coated with high temperature, pressure-sensitive silicone adhesive. A very durable and versatile product. Dimensionally stable and resistant to tears, punctures, abrasion, and wear. It will not cold flow under heavy load. Performs in continuous temperatures up to 500ºF.