Permatex29132 MotoSeal 1 Ultimate Gasket Maker Grey, 2.7 oz.

This gasket sealer is the only thing you want to use for anything that comes into contact with fuel. (probably oils and greases too) Regular gasket sealant will fail/leak on engine cases or fuel tanks at some point but not this stuff, it will hold up to direct contact with gasoline and other fuels and not dissolve away. I always have some of this on hand.

Product is the best for gas pumps. It will seal for many years.

It goes on a bit thinner (if you want it to) than their regular RTV form a gasket. I used it to keep the little gaskets on my lawn tractor carb on. It also eliminated an air leak that was causing rough idle without this on it. Happy I tried it.

Had a gastank mounted carburetor on an old school 5hp briggs&stratton motor.Would not stop leaking with a gasket,I coated both sides of gasket &tank&carburetor bottom,no more gas leaking.fills low spots to seal 100%!

Good product works as advertised

I use this on 2 stroke restorations mainly during full engine rebuilds. Especially when customers drop off 1 engine in multiple boxes they tend to make dings and scratches in the sealing surfaces. So I rub a thin coat on both sides of the gaskets' works perfectly. I do recommend shaking the tube for a few minutes before using or it will be runny. I always keep a tube handy even at the track just in case.

This stuff is awesome. Don't squeeze it out and spread like peanut butter. Apply a little then brush out with a small brush (throw-away chem brush). Then, miraculously, it self levels as it dries to tacky. If your surfaces are clean and flush, this is the stuff. I wouldn't try and fill gaps or irregularities like you can with RTV (bent valve cover for example). But for assembly of new or machined parts, perfect!And it's gasoline tolerant (very!). I used as intake manifold gasket on a 100cc 4 stroke and ... Poof!!... No more air leaks!Have already bought again! Highly recommend!

Best sealant for 2 cycle equipment