What does AGD put on threads to lock them?

[Thordic]

I have a big bottle of 545 I picked up at Grainger. Stuff works great, and its rated to seal threads at up to 10,000 PSI or something like that.

Best thing is, its REAL easy to get off. It doesn't cause anything to bind. It seals against any leaks, and helps a little to make sure threads don't back out.

And it smells good!

[Shaft]

The Ace Hardware thread sealer works good too,