Moss Out! 100503874 Moss Killer, Liquid, 25 oz

For roofs, walks, decks and patios. Kills moss quickly. See results in hours. Can be used anytime of the year. Controls moss and algae on and around homes and other buildings and home greenhouses. Does not stain concrete, pavement, stucco or wood. Does not damage gutters, metal flashings or downspouts. Treats up to 500 sq-ft. Contains 29.6% zinc.