This worked well when I had to replace the propane regulator on my travel trailer. But do be careful and try not to shred any of it as the male/female threads are being screwed together. That is don't allow this tape to overhang the male connector, start it slightly back from the edge, so it won't shred and get pieces in the gas line. Someone said liquid tfon  is better but this is easier and I could not find the liquid teflon.