The word Teflon is a registered trademark of the DuPont […]
The word Teflon is a registered trademark of the DuPont Chemical Company (now Chemours) for the chemical compound PTFE (polytetrafluoroethylene). The company charges more for the same chemical compound (much like you pay more for Kleenex over a non-brand tissue - it’s about the branding).
Standard Teflon tape is used on steel, plastic, PVC and copper water pipe.Pipe Sealing Tape Manufacturers
When installing or repairing plumbing pipes or fixtures, it is necessary to apply a sealant to prevent leaks on threaded connections. A common simple-to-use product, Teflon tape, is wrapped around pipe ends before attaching a fitting to create a sealed connection. Some good substitution of teplon tape are pipe joint compound, PTFE Thread Sealant and Teflon Valve Packing.
Putting teflon tape on the nut threads will not provide a seal. The only purpose of the nut is to hold the flare against the seat. Any leak will run along the tubing. If the connection is leaking, either the tubing seat, or the flare is malformed and needs to be either replaced or reflared.
Any PTFE tape is going to be a good substitute for a Teflon tape, because PTFE tape is a non-branded version of the same chemical compound.