SW Hard Surface Powder is a general all purpose cleaner used to clean wood decks, concrete walks and drives, and most home exterior surfaces. This product will remove mold and mildew stains, environmental soils and light grease and oils from most home exterior surfaces. Mix 8 oz. per gallon of water, apply with pump up sprayer, let sit for 10-15 minutes then rinse. 10 lbs yields 20 gallons of cleaner as directed.