Weatherlock G Self Sealing Ice u0026 Water Barrier 2 SQ

WeatherLock G Granulated Self-Sealing Waterproofing Barrier provides additional security against leaks caused by storms, wind-driven rain and shingle blow-offs. This product is engineered for asphalt shingles, wood shakes and quarry slate roofs. WeatherLock G acts as a waterproof barrier in the most vulnerable sections of the roof.