Real Seal joint sealant is a high performance gasket material made of 100% expanded PTFE. Although very strong and tough, it is soft and ‘marshmallowy’ in character, permitting it to conform easily to irregular surfaces and to compress to a thin, wide ribbon under pressure. It comes in the form of a continuous cord with an adhesive bead to aid installation. Because it is 100% PTFE, Real Seal can be used in many applications where other materials fail quickly, either because of attack by corrosive or caustic chemicals, or because of breakdown from exposure to high or low temperatures. Real Seal is highly compressive–only light flange bolt pressure is required to effect a seal. It is particularly useful in plastic, glass, and ceramic vessels and piping.