Expanded PTFE Tape Expanded PTFE Tape is an inorganic sealant for static applications made of 100% PTFE. A unique ... PTFE to a micro-porous fibrous structure, resulting a sealant with an unsurpassed combination of mechanical and chemical properties. ... are no templates, precut or special fitting requirements. Expanded PTFE Tape Specification Media: Acids, alkalis, solvents, gases, etc. Temperature: - ...