This expanded PTFE sheet is a heat resistant microporous panel made from white ePTFE foam. It combines temperature tolerance with chemical inertness and a breathable microporous structure, delivering reliable performance in demanding environments. Key attributes Material: Expanded PTFE (ePTFE) foam Color: White Size: 200 x 200 mm Thickness: 1 mm (0.510 mm thick options referenced in the product title) Structure: Microporous network for controlled permeability Properties: Heat resistant, chemically inert, nonstick, low friction Durability: Lightweight, flexible, compressible, dimensionally stable Quantity: 1 piece (1PC) Functional benefits temperature tolerance coupled with chemical compatibility, suitable for use in harsh environments. Microporous architecture allows gas permeability while providing a barrier to liquids, aiding venting and diffusion needs. Nonstick surface and low friction reduce sticking and wear in assemblies. Compatibility and use cases Gasket backing, seals, or spacers in temperature or chemically aggressive equipment. Filtration media, diffusion spacer, or venting layer in chemical processing, air handling, or battery/enclosure assemblies. Protective sheet for electronic enclosures, insulation settings, or packaging where moisture protection is desired without blocking vapor transfer. Use cases (illustrative) In a temperature gasket assembly, the sheet acts as a stable, inert spacer that maintains seal integrity. As a diffusion spacer or vent layer in filtration or battery housings, enabling gas flow while resisting liquid ingress. As a protective, insulating sheet inside electronic enclosures or equipment cabinets, reducing contact wear and moisture exposure. This product description reflects the original specifications: 1PC Expanded PTFE Sheet, Heat Resistant Microporous PTFE Panel, White ePTFE Foam, size 200 x 200 x 1 mm, with a thickness range noted as 0.510 mm in the title.