I agree thw weatherstrip will work a couple times but will probably glue the lid to the drum after time.
Do you have the kettle the lid came from? The best thing to do is cut the lip from the kettle and install it inside the drum.
Pitboss @ Woodpile BBQ Shack
I cook the best brisket north of Dallas. Get over it.
Michigan State Lead-Operation BBQ Relief
BBQ Person of the Year 2013