Expanded PTFE sheet, 0.5 mm thick, 6" x 6", white (Pack of 2). expanded PTFE supplied by Sterling seal & supply is much softer and more flexible than regular PTFE sheet and conforms easily to irregular and rough surfaces. This material is easier to compress and minimizes creep and cold flow. Expanded PTFE supplied by Sterling seal & supply complies to FDA regulations for food contact and EU 1935/2004. Virgin PTFE sheet can handle virtually all chemicals in the 0-14 pH range with the exception of molten alkali metals and elemental fluorine. It is suitable for service at temperatures from -450 Degrees Fahrenheit up to 500 Degrees Fahrenheit; pressure vacuum up to 2900psi (200bar). expanded PTFE is particularly recommended for applications in the food and beverage industry where high purity materials are required. It is also used where contamination or discoloration of flow media cannot be tolerated. Expanded PTFE sheet material is common for applications in the following industries: - distillers, petrochemical, food and beverage, pharmaceutical, general chemical, power generation, iron and steel manufacturing, pulp and paper and marine. Because of its superior chemical and thermal properties, PTFE is often used as a gasket material. It is suitable for all types of flanges, nearly all media, a wide temperature range and for applications with the toughest demands on purity.