head gasket sealant

[bushbean]

Got a used short block from the junkyard. Looks pretty good. But there's one or two small scratches on the surface of the block. I know normally you're not suppose to use sealant. But for the scratches, should I use those copper sealant on the head gasket?

[Vanilla Sky]

Have the block decked. That's really the only way to get a good surface.

[forrest89sei]

I know honda says to use HondaBond

[Hauntd ca3]

get 10 thou whipped off it or how ever much it needs to get it flat.
you should never have to use sealant on a head gasket

[Ichiban]

How bad are the scratches really? If the deck is flat, you can probably draw file the high spots off, and let the gasket do what it's supposed to; seal imperfections between mating surfaces.

Or get it decked, the "for sure" way to ensure it seals.

Do not use sealant on a head gasket.

[88Accord-DX]

If the scratches are small, get the block decked to least amount possible to remove them.

That Indian schellac is something of the past & DO NOT recommended using it.

I have used copper head gasket spray on a copper head gasket set, that is a totally different application.