Spray & Forget 32 OZ, Ready To Use, Premixed, Exterior Small Surface Cleaner No Rinsing Required,Removes Green & Black Algae, Mildew, Fungus & Lichen Stains From Roofs, Siding, Decks, Brick, Stucco, Lawn Furniture & Other Exterior Surfaces, Biodegradable, Non-Corrosive & Does Not Require Damaging Power Washing, There Is No Rinsing Required & Your Landscaping Will Not Be Compromised, An Eco-Friendly Product That Does Not Contain Any Bleach, Chlorine, Lye & Heavy Metals Or Acids.