Ding, ding, ding. sibermike has hit the nail on the head. Duct tape, a million and one uses (oddly, fixing ducts is not one of them... park on your driveway, drive on the parkway and never, ever use duct tape on a duct).
If you want to go ultra-deluxe, use the shiny metal tape they actually use on ducts.
Hey you're right, that stuff would be great to use because it would double as a signaling mirror!
