PTFE, or Polytetrafluoroethylene, is generally known to the public by the brand name Teflon® (DuPont™) and is quite commonly referred to as plumber's tape. PTFE is compatible with a wide range of materials due to a low coefficient of friction and being very non-reactive.
PTFE Thread Seal Tape is widely used for general water plumbing applications because of its consistent quality. It’s also simple to use:
Material: Min. 99% PTFE
Temp. Range: -212°F (-100°C) ~ +500°F (+260°C)
Standards: ISO 9001-2000