Krud Kutter, Gallon Concentrated House Wash, Cleans Exterior Vinyl & Aluminum Siding As Well As Painted Or Stain Wood Siding Or Shingles, Also Cleans Brick, Concrete, Stucco, Masonry, Gutters & Roofing Of All Types, Removes Dirt, Chalking, Oxidation, Weathered Wood, Tree Sap, Bird Droppings & Tough Stains From Mildew, Mold, Algae, Fungus & Moss, Also Works On Patio Furniture, RVs, Autos, Boats, & More, Mix With Water & Apply With Scrub Brush Or Pump Up Sprayer Or Use In Pressure Washer, Safe For People, Pets & Plants, Covers Approximately 4,000 SQFT.