Re: Gasket sealant?
My go to sealants are Hylomar and Copper Kote, mostly Hylomar.
Hylomar never gets hard, will not plug up oil passages and if you over apply it and it gets into gears or bearings it will pulverize and dissipate into the oil supply rather than muck up the works. The only solvent I have ever known that will affect it is Acetone.
"It's a chinagirl. It's a sometimes fun little engine that often will break your heart. It's disposable.
Does not come with a fortune cookie."