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I bought some stuff and was going to try to seal mine up some, but after beginning to use it and getting used to it i decided it wasnt worth it. It works just fine.
This latex caulk is designed to resist high temperatures and smoke in nonrated construction.
For use on or around: wires, pipes, ducts and vents in wood or steel framed nonrated construction Features
read the pdf from the link... 2 things stuck out. interior use only, and contact physician imediatly if swallowed, the pdf msds sheet is incomplete as it does not list what the ingredients are in it. pretty sure i would pass on this one for use in my smokers with this data.
This stuff looks like what we call Furnace Cement.
It has silica in it. We use it to seal flue and wood stove fittings and to repair and patch up stoves. I would be a little leary about using this around food, unless you are willing to let it set up and heat treat it first. Even then I would be leary