Terms of the Trade: What Is Thread Seal Tape? Terms of the Trade: What Is Thread Seal Tape?
Thread seal tape, also known as plumber's tape or PTFE tape, is used to seal pipe threads in plumbing projects. It serves a couple purposes: to lubricate the threads, making it easy to tighten and seal the joint, and to prevent the threads from seizing when unscrewing the pipe. The tape is wrapped around the threads before the two pieces of pipe are screwed into place. Tip: Wrap the tape clockwise around the threads to prevent it from unraveling when screwing the joint together.