On the last gasket I used the Car Quest brand of silicone, its the copper 700 degree formula, says on the back its made by Permatex. It failed on the last pizza cook.
So I'm trying again using the Permatex labled stuff, (the one on the left).
This time I decided on a different approach.
I cut a groove in a piece of MDF 3/16" deep to fit the diameter of my Lg. BGE.
Filled the groove with Permatex brand silicone
Let it dry 24hrs then pulled
A little of the MDF board stuck but it will burn off the first cook, its just cardboard
Then just glued it on, real easy.