Vibra-TITE 550 Blue Core Plug Sealant, 50ml Bottle

While working on a Mini Cooper, I need to replace a plug located in the head that is between coolant and the engine oil. It is a very hard to access location and a very, lets say, interesting design.I only wanted to do this job one time. For the reassurance and extra protection, I used this core sealant to make sure the plug wouldn't fail again. It worked like a charm. No complaints about the product.

After having issues with the core plugs on my l28 seeping after install I did some poking around on the forums and was lead to this product.It's the only product designed specifically for core plugs that I could find that was easily accessible for someone like myself.I read over and over to install core plugs with no sealant of any kind, but once I spent some time on some serious engine builders forums I ran into a lot people saying that if you're installing core plugs on an old engine or you're replacing core plugs that rotted out it's a good idea to use a sealer. Many people recommended "Indian head" sealer but I wanted something designed for core plugs if I could get it.When a machine shop presses core plugs into a freshly hot tanked block or a block that they machined the core plug mating surface on the mating surfaces are going to be almost immaculately clean and the need for a sealer is non existent.If you're like me and you're slapping some bronze plugs into a 45 year old motor that sat not running for twenty years with the cooling system full of coolant, trust me when I say it's worth your time and effort to use this product. Worth every penny

I used this on freeze (expansion) plugs on a 1999 Ford 5.4L engine. It works extremely well, almost permeant. Note, it only hardens between metal; so any on the surface of the block is going to stay a liquid.

This sealant works really well and I have used it repeatedly without any issues

Used for a 2-cycle Zama carburetor welch plug. Used primer/activator designed for his sealant.... let cure for over 30 hours before reassembling and putting gas/oil in it.Carb worked for a few hours then had issues (acting like clogging issues).Upon disassembly, I found that the gas/oil mix (50:1) had partly dissolved the sealant and had turned it into a white flaky substance. The flakes had clogged the carb jets.Do not use for gas/oil contact! (Gas was <10% ethanol content).Use Loctite 540 instead.

good quality sealant.

This is made specifically for freeze plugs and carb plugs, fuel resistant.

very nice compound for setting automotive cup style freeze plugs or expansion plugs