SmartFlash ONE is a one-part, seamless, durable liquid applied polyurethane bitumen waterproofing resin. It is designed for flashing new or existing penetrations and construction details within low-slope modified bitumen and/or built-up roofing (BUR) roofing systems. SmartFlash ONE is also a durable, long-term repair solution for flashings or cracks within a steep slope asphalt shingle roof. SmartFlash ONE membranes form full closure to irregular flashings and penetrations of every imaginable shape, and eliminate the need for pitch pockets on low-slope penetration details. SmartFlash ONE, when cured, virtually becomes part of the substrate.