Wet & Forget Outdoor Moss, Mold, Mildew, & Algae Stain Remover, 64 fl. oz.

?Simply spray and leave it-no rinsing or power washing needed.Cleans moss, mold, mildew, and algae while preventing regrowth for up to a year.Bleach-free and non-acidic; safe for use on roofs, sliding decks, and walkways.One 64 oz. bottle treats between 750 to 2,250 square feet.