POLY-TEMP® MD PTFE Tape is effective and simple to use. - 99.9% pure, medium density, chemically inert tape that is suitable for oxygen service. Application: - Used to Form a Leak Proof Seal and Help Prevent Cross Threading on Pipe Threads Material / PTFE Density / 0.7 to 0.8sg Width / 1/2 in Length / 520 in Thickness / 4.0+-.05 mil Color / White Gas Pressure Range / 0 to 2000 psi Performance Temp. Range / -400 Degrees to 550 Degrees F Liquid Pressure Range / 0 to 10,000 psi