Originally designed for golf course maintenance, GroundsKeeper removes rust, iron and mineral stains, dirt, grime, light grease and mildew from sidewalks, cart paths and parking lots. GroundsKeeper uses a synthetic acid that outperforms acid and caustic cleaners, yet is safe on exposed skin. It’s also safe on stucco, brick and stone, and will not etch the windows on adjacent buildings. GroundsKeeper will return spray tanks to their original color. And it will also remove stains from asphalt.