Mean Green® Concrete & Driveway Pressure Washer Ultra Concentrate was developed to penetrate and dissolve tough oil, grease, dirt, mildew and algae stains. It is proven to clean and revive surfaces including driveways, sidewalks, patios, walls, garage and basement floors made of concrete, brick, masonry and asphalt. This product can be used with pressure washer equipment or manually to clean many exterior surfaces. Cleans, Degreases And Revives Concrete & Asphalt. Covers More Surface Area Than Other Brands: Cleans 7500 Square Feet! Makes 30 Gallons (29:1) With Water. Biodegradable & Safe To Use Near People, Pets And Plants.