I bought a Harbor Freight 18 gauge brad nailer the other day and changed the quick change fittings to the style that I use in the shop. I removed the original connector on the tool which had a red hardened sealer. I used teflon tape on the replacement connector 3-4 wraps. I have tightened it as tight as I am comfortable with and still have an air leak from the connector threads. I have a friend who had a similar problem and continued to tighten the attached connector, which caused the "metal" of the gun around the thread area to crack, which obviously caused the leak to get worse and made the gun unrepairable. I don't want to over tighten and crack the gun body. Is there a sealant I can coat the threads with that, once dry, will create a seal that will survive at least 80 lbs of air pressure?
Thanks