I think some of those "Space blankets" are Mylar. They are just packaged and called something else is all. You want the ones that have a smooth surface so you can install them flat and clean with as few wrinkles as possible. Just make sure it is Mylar; the packaging should say. White poly liner is the next choice to Mylar. Lotâ??s of people are using it because it cleans easer and installs easer then Mylar.