Pipe sealant or teflon tape

[Rawze]

I use permatex red silicone on my pipe-threaded air-line fittings. I do not put excess amounts of it on them, but I do pack it into the threads just enough so that it seals. I have used other products of various types in the past .. but the permatex red seems to have the most consistent results for a 100% seal.

Only A very tiny amount packed into the first couple of threads at the entrance of any female fittings (no excess), and the male fitting gets threads packed all the way up.