IKO RoofGard-SB underlayment is made of a synthetic material that is completely waterproof. It forms an effective water-shedding barrier under shingles or alternative roofing materials, such as shakes, tiles, slate or metal. Even in cold weather, it’s incredibly flexible and easy to work with. RoofGard-SB has a slip-resistant surface. For more information, visit www.iko.com.