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Minister of Fire
I'd take the SBI guy's advice 1st: that aluminum tape handles some prtty good temps.... sure if you stuck a piece to the stove top, it'd crinkle after a while, but for areas like the air intake, it'll stay forever (or untill you peel it off). A damper could be done, but alot more work.. draft is a realtively weak force, don't over think it.