Rust-Oleum 380 Non-Fibered Asphalt Emulsion Coating is a premium, water-based protective coating for built-up asphalt roofing and concrete foundations. Asphalt emulsions are faster drying, low odor alternatives to solvent-based asphalt roof coatings. 380 Non-Fibered Asphalt Emulsion can be used as a base coat for reflective coatings or as a protective coating for new or existing composition roofs with smooth (not graveled) surfaces. 380 Non-Fibered Asphalt Emulsion can also be used for damp-proofing exterior below-grade foundations and walls. Protective coating for smooth built-up roofs and concrete foundations, Ideal as a base coat under reflective coatings, Waterproof when dry; corrosion resistant, Will not run, crack or sag in extreme weather.