Permatex59214 High Temperature Thread Sealant, 6 ml Tube, Pack of 1

I used this on oil plugs for oil pans, transfer cases, differentials and a few other things. No issues or leaks so far. Easy to apply, reposition and seals well.

I have been fighting an air leak for years on my motorcycle. This finally fixed the leak and is still holding a month later. Impressive.

This durable thread locker is easy to use, dries fast and of top quality. Perfect to use on bolt on the engine.

Nice and hefty when spreading around, better value than small tube

In my Q.C. lab days, I had a partner who would periodically measure, with a precision optical comparator, tooling for machining threads. He had gauge wires to check the pitch, and go-no go gauges for quick checks. I really wish they used the same exacting standards routinely in Asian manufacturing. I have had more sloppy parts, with off-spec. threads since the East dominated the manufacturing of many commodity fittings. I actually got parts with an apology note enclosed, that said, to use lots of PTFE tape to make a good seal. I ran out of S.W.A.K. anaerobic sealant, which was my usual salvation for loose threads. A new supply of that is very pricey. PTFE tape failed, Hardware store pipe sealant failed. So I tried this. It is a lot like S.W.A.K. sealant. I let it setup for a full four hours. I re-pressurized the system, and thankfully, no leaks. I like the way it goes on as a thick fluid.

I've had leaking threads on the oil lines for a remote spin-on engine oil filter, for years. Disassembled, cleaned everything thoroughly, and applied according to instructions. Let the connections set for 2 days, just to be sure. Knock on wood, but all connections are still perfect a month later. The little that remains on the outside still smears, but the threads are solid. Apparently the pressure in the threaded joint is what causes this sealer to do its job. I give this stuff 5 stars.

I used this to seal an old gas line we capped. Worked great. No leaks.

Used this to seal a oil line fitting on an oiled air compressor, worked like a charm! Highly recommend this product.