Originally Posted by jchawk
I'm thinking about applying a bead of caulking once I have it in its final resting place but I'm not sure this is required. Thoughts anyone?
Bead of silicone caulk is a good idea - assuming the lid opens/closes on this collar, you want the top surface good and flat, to allow the seal on the lid to do its job. And the collar should be sealed to the freezer.
Air infiltration will add moisture to the inside, which you will be constantly fighting.