[Richard]

First of all, banish the teflon tape from your tool box. All it is good for is shredding little pieces and stopping up the air control valves. I like the yellow Rectorseal for pipe threads. The Loctite 545 is used on pipe threads where you may not be able to tighten them as tight as you normally would. It will seal threads that Rectorseal will not seal.

You don’t use any sealant on the compression side of the air fittings, only on the pipe thread side.

That’s my .02