Review on Loctite 30509 5900 Instant Gasket by Lamar Marshall

I bought this product because the engine manufacturer I worked for recommended it for sealing mating surfaces where gaskets were not available. It seals well, but its consistency makes it difficult to apply and doesn't stick well until another surface is interposed to hold it. You're trying too hard to evenly apply it and it's squeezing into the engine where you don't want it. It's also very expensive. There are other sealants that work just as well, are easier to apply, and are a lot cheaper. This item is one and done for me.