Eqaulseal.com PTFE Gasket Tape is a flange gasket material made of 100% pure expanded PTFE. Available in spooled form, it is an ideal gasket material for glass-lined and plastic flanges, flanges with limited available space, and flanges where compressed thickness is important. The expanded material conforms easily to rough and irregular surfaces, requires lower bolt torques than most other gaskets, results in an extremely tight seal, and has an adhesive-backing for easy installation