With an extremely low coefficient of friction, PTEF makes an excellent lubricant.
Extremely hydrophobic, it does not dissolve or get wet, and will not wash off.

Protects from -65 F to +650 F
Reduces wear and friction
Non-toxic, nonstaining
Great on zippers, winches, etc.

PTEF is Starbrite's name for PTFE (polytetrafluoroethylene). The best known brand name of PTFE is Teflon by DuPont.