How-To make the Tar Creature from Scooby Doo Where are you.

Materials: 2x3s, shrink wrap, chicken wire, bubble wrap, Great Stuff foam, Dragon Skin, Leak Seal and monster mud.

Correction: Don't bother using Dragon Skin, just coat with Leak Seal.

Don’t use dry wall compound without mixing it with latex paint ie. monster mud. The compound will crack and flake if not mixed with latex paint. I would just use spray foam instead If I rebuilt this prop.