SBS Smooth is a premium inter-ply membrane made with Styrene-Butadiene-Styrene modified bitumen and reinforced with a non-woven polyester mat enhanced with continuous glass fiber strands. The combination results in a flexible, durable membrane. The addition of SBS rubber optimizes asphalt's natural waterproofing characteristics and increases system performance. This proprietary compound provides resistance to thermal and physical forces over a wide range of temperatures. SBS Smooth is ideal for both new construction and re-roofing applications. Low slope roofs of any size, even those with numerous penetrations, may accommodate a SBS Smooth application.