BEHR PREMIUM CONCRETE & MASONRY DEGREASER & CLEANER is part of the BEHR PREMIUM family of Concrete & Masonry Prep products. It is a powerful citrus-based, multi-purpose cleaner specifically formulated to remove grease & oil stains, algae stains, mildew stains, dirt and most auto fluids from concrete surfaces. This easy water clean-up product is safe for use indoors or outdoors and can be used full strength for tough stains or diluted for general cleaning. BEHR NO. 990 is ideal for use on coated or uncoated surfaces such as: garage floors, driveways, patios, walkways, porches, basement floors, concrete, brick, stone, asphalt and exposed aggregate.