Permatex 57535 Seal and Lock Thread Compound,Thread Lock & Screw Glue for Bolts Nuts & Fasteners to Prevent Loosening & Corrosion, Removable w/Hand Tools 35 ml

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.

use on high temp and high vibration applications

Item as described

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

Dries quickly enough, and not messy. Good value for the amount you get as you just mainly dab some on the threads.

Worked as advertised.

I was in need of a thread sealer for my 1993 F-150 rear differential filler plug. I had never used any kind of thread sealer before, but this stuff is pretty impressive. It's obviously easy to use and works very well. I'll be using it going forward.

If you have a stubborn threaded fastener that constantly weeps, such as automotive differentials, transfer cases and such, this is the stuff to use. It not only stops your leaks but also locks them in place, but easily removable with regular tools. Excellent for tractors/farm, automotive shops, and home garages. A little bit goes a long way.