D.N. Group Enterprise Inc. 540" x 1/2" yellow plumbers Teflon tape or thread seal tape is a simple but highly versatile thread sealant, used primarily in ductwork and piping applications. The length of this gas seal tape Model is twice as long as the same models and has a higher density than other types of Teflon tape, which is 1.3 g/cm3. PTFE stands for polytetrafluoroethylene. It is essentially a long strip of synthetic polymer film sold on a spool. One key material characteristic of this Sealant Tape is the fact that it is a tape for gas fittings. This makes thread tape incredibly useful for a wide range of plumbing and pipework jobs - which is why you will find a thread seal tape of some kind in almost every well-stocked pipework or plumbing too. Gas line pipe thread tape is suitable for use in high bar applications like fuel injection systems. Non-stick backing makes it easy to reapply later or remove, without having to clean messy adhesive from the inside surfaces of duct joints and pipe threads. This propane yellow tape (PTFE) thread seal tape is compatible with metal or plastic piping (up to 1-1/2" diameter) for gas and water, most chemicals, hydraulic lines, air, sewage, and sprinkler piping.