Concrete and Driveway Cleaner is specially formulated to remove oil, grease and grime from concrete, brick, block, slate and more. It removes most tough stains and discolorations (not caused by dyes), and is noncorrosive and nondegrading. This powerful formula was developed to be used with pressure-washing systems or for manual cleaning of concrete walkways, patios, driveways and sidewalks. Labeled directions ensure equipment and landscape safety. Cleaner is safe for areas visited by children, pets and wildlife. Concentrated formula makes up to 21 gallons.