StormGuard Leak Barrier will Protect your home by preventing costly repairs due to wall or ceiling staining. Help prevent leaks due to water damming in your gutters, wind-driven rain, and, in the North, damaging ice dams. Create a 100% watertight seal that keeps water out at the most vulnerable areas of your shingle or metal roof (at the eaves and rakes, in valleys, around chimneys, etc.).