Spray & Forget SFSRC-6Q 32OZ Conc Spray/Forget, 32 OZ, Super Concentrate, Spray & Forget, With Built In Hose Sprayer, Pre-Mixed, Revolutionary Patent Pending Cleaner That Removes Green & Black Algae, Mildew, Fungus & Lichen Stains From Roofs, Siding, Decks, Brick, Stucco & Other Exterior Surfaces, Biodegradable, Non-Corrosive & Does Not Require Damaging Power Washing &/Or Brushing Techniques, 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.