Certified by NSF to meet ANSI/NSF Standard 61 for use on potable water. Non-toxic and lead free, the Pipetite Stik is for use for water, steam, air, natural gas, and LP gas. Use on metal threads. Do not use on Oxygen service, use PTFE Tape. Sealing temperature is up to 350° F (177° C) and pressures to 2,000 psi (136 bar) for liquids and 350 psi (24 bar) for gasses.