Loctite 565 442-56507 PST Thread Sealant, White, 6ml

If you have about 24 hours to let it fully dry, then highly recommended. I’m sure you could do it in less, I found that to be a sweet spot. Works 10x better than tape. I’ve yet to have a leak on any of the fittings I’ve let cure.

I used Loctite 565 to seal the brass threads when replacing the pressure regulator on my air compressor. I had tried Teflon tape and Rector Seal, separately and together, without success. I actually cracked one new regulator by over tightening it in an attempt to stop the leak when using these other products.I then used Loctite 565 per the instructions (It is very easy to apply), installed the regulator and immediately started the compressor. The instructions did not say to let it cure. But I expected it to leak and to have to redo the connection and allow a few hours for the Loctite 565 to harden. It has the consistency of shampoo. That is to say not runny, but not very thick either. That's why I thought it would need time to set up. Surprisingly, It held 125 psi right away!Since I turn off the power to the compressor every time I leave the shop, I can say for sure that the connection holds 125 psi for at least three days and probably much longer. This is my new go-to thread sealant!

If you need to seal up them fittings, you know the tape sucks, get this stuff and place just a lil dab on the threads. My go-to from now on.

Good price and quick shipping.

Must have for a toolbox

You SHOULDN'T need this for NPT and flare fitting installations, but I used it anyway due to the difficulty of accessing some connections on my airplane. Will NOT clog filters like stray bits of teflon tape.

Not as described

A bit expensive but worked perfectly