PTFE Pipe Thread Sealant Tape
Before Dupont got all picky about their trademark, this product used to be called Teflon Tape.l
Rolls on dry and molds into pipe threads to form a leak-proof seal
1/2" x 43 ft roll
When appying remember to wrap in the same direction in which you would screw a nut onto the fitting, and to start at the opening of the fitting and wrap toward the body. This way the tape will not unwrap as you tightend the fitting.