Driveway cleaner. Contains Oil Grabber, a unique additive which penetrates the surface to dissolve tough stains from grease, oil, algae, mildew, and dirt. Super concentrated ready-to-use formula. For use on concrete, brick, masonry, asphalt, driveways, patios, sidewalks, garage, and basement floors. Also prepares surfaces for finishing by promoting the adhesion of paint, stain, and sealers. Non-toxic, non-abrasive, biodegradable, and non-flammable. Size 1 gallon. 2 pack.