Exhaust gaskets that do not stick

[oldford]

I'm installing new exhaust gaskets on my 36 engine manifolds and would like to know if there is some type of release agent that i can put on the gaskets to keep them from sticking on the block when I remove the manifolds later. I remove the manifold every winter to install a hot air manifold and it's difficult to scrape all the gasket material that is stuck to the block.