that will depend on how the lid sits on the drum, is it inside the rim, outside of the rim, or just sits on top of the rim. You can use high temp. silicon or the rope type stove gasket and that should seal it up airtight!!
Robert aka Big Bob. :typing:
Home built 120 gallon stick burner on wheels,
Master Built 7-in-1 vertical,
Master Forge Charcoal grill,