Red RTV will work well. It's what has been holding our stove gasket for the past 4 yrs. Put about a 1/4" bead in the gasket trough. Not too much or there will be ooze. Press the gasket into place without stretching. Close the door on a full sheet of newspaper and let it set up for 12 hrs.first time heard of RTV, I am a rookie, thank you I will check it.
By the way, do you think first time break in 400 degree, keep rough 1 hour, is there any damage to any parts?