Thread seal tape (also known as PTFE tape, Teflon tape, or plumber's tape) is a polytetrafluoroethylene (PTFE) film tape commonly used in plumbing for sealing pipe threads. ... Thread seal tape lubricates allowing for a deeper seating of the threads, and it helps prevent the threads from seizing when being unscrewed.

Does Teflon tape seal?

Plumber's tape, often called Teflon tape, (polytetrafluoroethylene, or PTFE) helps you get a watertight seal on threaded pipe joints.

Is Teflon tape a thread sealant or lubricant?

Teflon tape is a white, nonstick tape that actually serves as a lubricant as the threaded parts of a piping system are connected. That means that Teflon tape, to put it precisely, isn't a really a sealant, but it is used to prevent leaking. The tape does stop leaks by clogging the thread paths.