Red Seal Steamfitter/Pipefitter Practice Exam 2026 – Complete Prep Resource

Teflon tape is commonly used for threaded joints in piping due to its ability to create a watertight seal. It is made of polytetrafluoroethylene (PTFE) and works effectively by filling the spaces between the threads of the pipe and fitting, preventing leaks. When wrapped around the threads before screwing the joints together, Teflon tape allows for a tighter fit and reduces the likelihood of corrosion since it is chemically resistant and has low friction.

The unique properties of Teflon tape make it ideal for applications involving water, steam, and other fluids, ensuring that threaded connections remain secure over time. Additionally, it is easy to apply and does not harden, allowing for disassembly if necessary without damaging the threads of the fittings. This versatility and effectiveness are what make Teflon tape the preferred choice for sealing threaded piping joints.