When there's a nagging roof leak that others can't fix, or when you don't want to take your chances, use Through the Roof! Its unique co-polymer rubber formula creates a permanent, invisible seal, even when applied in the middle of a rain storm. (It works great on dry surfaces, too). Through the Roof! will stick to almost any roofing surface – metal, plastic, asphalt, wood, concrete, and more. Plus, it won't freeze. So go ahead and fix that gutter in a Minnesota winter.