Water-based, biodegradable The proprietary formulation contains "Oil Grabber", a unique additive which penetrates the surface to dissolve tough stains from grease, oil, algae, mildew, and dirt. The concentrated formula is ideal for use on concrete, brick, masonry, asphalt, driveways, patios, sidewalks, garage and basement floors. It also prepares surfaces for finishing by promoting the adhesion of paint, stain, and sealers. This listing is for each.