Aqua-Dynamic Yellow Gas Thread Seal Tape, 1/2" x 480"

Thread seal tape is a polytetrafluoroethylene (PTFE) film cut to specified widths for use in sealing pipe threads. Thread tape is appropriate for use on tapered threads, where the sealing force is a wedge action. Yellow – used on NPT threads 1/2 inch to 2 inch, often labeled "gas tape".

Manufactured especially for natural gas, propane, butane, water, oil and chemical lines. Heavier than white tape with density of 1.35-1.50 grams/cubic centimeter. 4 mils thick. Complies with MIL-T-22230A (ASG), UL 31 RO, AGA 3226 and CAN/ULC-S642

The tape is wrapped around the exposed threads of a pipe before it is screwed into place. One of the defining characteristics of PTFE is how good it is at defeating friction. The use of PTFE tape in tapered pipe threads performs a lubricating function, which more easily allows the threads to be screwed together, to the point of deformation, which is what creates the seal.

Also commonly known as Teflon tape