More economically suited for some markets, Low-Density PTFE thread seal tape compliments our line of premium POLY-TEMP® tapes. Still made with virgin PTFE (Polytetrafluoroethylene), this tape remains flexible, is a thread sealant for all services, chemically inert, non-hardening, and withstands temperature ranges between -400 ºF to 500 ºF (-240 ºC to 260 ºC). It is compatible with all pipe materials without exception, forms a permanent seal for the life of the connection, and is recommended for all pipe sizes (larger thread sizes require more wraps). Meets MIL-T-27730A.