This old man has gone clear nuts

I don't have a huge heated shop, for that matter any heated shop. I need SOMETHING to keep some of this out of the "rust belt."

Anybody have ideas on gaskets for the drums? I'm thinking of buying some of that thin wall plastic tube and slitting it, then laying it around the top lip.

Your seal idea with the tube sounds good, how about rubber hose instead of plastic? Also, there may be condensation with changing temps. Maybe you can vacuum seal the parts in plastic before putting them in the drums?