No Leaks so far. It'a been over a month. Sealed the Timing chain cover for 2002 CorollaUpdate: 7/22/22. Still works great. Awesome product.

Leak proof

Used it for my intake manifold and it held up great!

Permatex is the good stuff, of course. There's just one design flaw: the nozzle clogs after one use. In other words, you'd better use all of this in one sitting, or the included nozzle is useless.I used this to seal my valve covers, and there was a week and a half between uses (hey, I'm a working stiff and this is a tough repair -- I can't do it all at once!). The first use was great; I was able to use the nozzle to put a bead of sealant near the front cover seal, as recommended by FoMoCo. But the next use, the nozzle was one solid lump of sealant, and I had to ditch it and just use the tube directly. It still worked, but it was less precise than the first use.Otherwise, the sealant itself is good stuff, I think (time will tell!)

The name speaks for itself, with many years of quality products

Never leave home without it! Just kidding! It's great gasket material though!

as described

Does it's thing

did the job when sealing exhaust pipe

What can I say? It's great, gave me time to assembly the timing cover on a 2010 traverse 3.6L allowing about an 2 hrs before hardening to assemble. Was not old stock either. A