Jomar’s White Stuff is a slow drying, soft setting, nonhardening PTFE pipe thread compound. It will not transfer taste or odour to the system being sealed. Excellent for food and water systems. It is lead free, anti-galling, noncorrosive, nontoxic, and will not harden in tube.
We have found that to make an excellent joint, if you use the PTFE from the tube on the male threads of the fitting and then apply some PTFE tape on top of that, it makes a great job. Sort of like a "belt and braces" approach to plumbing. It avoids the common problems with using PTFE tape on it's own, where sometimes you don't get a watertight joint (usually this is somewhere really awkward to repair ! ).
We've shown below the blurb from the back of the tube :
PTFE PIPE THREAD SEALANT COMPOUND * SLOW DRY * SOFT SET * NON-HARDENING.
This thread sealant compound is specially prepared for all temperature connection work as specified. Recommended for all applications where cleanliness is essential. Lubricates and protects all threads. May be used on steel, copper, brass, aluminium, ABS, PVC and fiberglass piping. Non-toxic. Contains no lead. NOT FOR USE ON OXYGEN.
Directions : Knead tube before use. Clean threads of dirt and grease. Apply only to male threads. Joint may be made up immediately or within four hours as desired.
Brushable from -50 to +400 Farenheight.
Pressure ratings : gases 3,000 PSI liquids 8,000 PSI
2 FL. OZ. (59ml)