I've got a gasket seal for my stick burner to line the lid area. Instructions say once the gasket is in place using the silicon adhesive to get the temp to 400 for two hours. What do you recommend putting in the box to burn that hot for two hours? Wood, big pile of coal?????? Added: Disregard-after reading further instructions on another page, I was given rtv which does not need to be cured with heat. Only the Rutland adhesive requires curing with high heat.