SB-800 Xerosol™ FR is 96% solids, two component, one to one by volume polyurea hybrid coating. SB-800 Xerosol™ FR is intended for use as a spray applied, fire retardant protective roof coating for use over concrete, metal, polyurethane foam and smooth built-up roofs. SB-800 Xerosol FR should not be used directly over rough built-up roofs unless polyurethane foam is used to create a smooth surface. SB-800 Xerosol™ FR can also be used over various single-ply membranes. Contact SprayBuilt® for more information.