Krud Kutter Concrete & Driveway Pressure Washer Concentrate provides an eco friendly clean for your concrete, asphalt, brick and masonry surfaces. Non-toxic formula provides fast and easy application with no bleach or ammonia. Ready to use for powerful stain removal and surface preparation for paint, stain or sealant finish. Penetrates the surface to remove stains without harming nearby plants and shrubberyIdeal for use on concrete, brick, masonry, asphalt, driveways, patios, sidewalks and garage/basement floors to clean and increase adhesion of paint, stain and sealersBiodegradable, water based formula contains Oil Grabber to dissolve tough stains from grease, oil, algae, mildew and dirtConcentrate covers up to 3,200 square feet when diluted and works in 5-10 minutes