The tape doesn't seal well. It's hard to peel the paper off the tape, the plastic sheets don't even stick to it, and the tape barely sticks to the window frame. I had to use packing tape to keep these from peeling from the wall. I got NO seal whatsoever with Frost King. Had to use other tape all around the entire thing. This never happened w/3M.You'd be better off buying double-stick tape and rolls of plastic you can cut to size. Or just stick with 3M -- more expensive but I used that stuff for years w/out issue.