What is the best head sealant out there

[SSDiv6]

Originally Posted by Joe Kohorst

I think I have a leaky head and need a sure fire sealant to fix it. Any suggestions...?

I have used Seal-All Polymer Sealant successfully in the past. Clean the cylinder head, pour it in the water jacket to fill it up to coat the inside of the water jacket and put it in the oven at the recommended temperature. It leaves a rubberized coating inside the water jacket.

https://goodson.com/products/cps-32-...polymer-sealer