Coolant gasket dressing

I used "Honda Bond" sealant on all the gaskets on my Ferrari and have been very pleased with the results.

 

I have very good luck with Hylomar Universal Blue on my vintage Ferrari. It was developed in the UK for Rolls Royce. Ii works quite well on any fuel connection.

 

Definitely Hondabond!
Make sure both surfaces are wiped clean with acetone, then a thin layer of Hondabond on both sides of the gasket.
You won’t ever have a leak.


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Hylomar, spray can variant whenever it is possible as the layer is much mire thin. Makes a cleaner result.

The product ends-up like post-it glue: somehow detachable.

 

3Bond 1211 is what I use. It has a pretty long set time and that allows me to get it all in place and torqued before it starts to set. HondaBond is designed to seal case halves and I find it is very hard to clean up and can cause gaskets to tear. These are large long aluminum engines, they move, & expand and contract. It is my belief that the gaskets need to allow for this movement. If they are heavily stuck with sealant, they just tear and leak. I use very little sealant on most gaskets, just enough to seal corners and a super thin layer to help fill in scratches as the OP said. Hylomar, I dislike a lot. It is nasty to clean up and only seals well in gasoline situations. I will use it for gas tank flanges but that is all.
Just my 2 cents. It is not the only way, just my way.

 

The nice thing about Hylomar is that is non-setting. I have had good luck using it with gas, oil, and water. The reason it can be hard to clean up is that it seal everything. IMO it's not a good idea to "glue" your engine together.

There is another product, Loctite 518, that is made just for aluminum flanges. Once you put the connection together, it's hard to take it apart in the future; but it won't ever leak.