CENTRAL GARDEN BRANDS Moss Killer, 3-Pound Corry's Moss B Ware Pallet Display 143lb Kills and prevents damaging moss on roofs, patios and walkways for up to two years Destroying and preventing moss can extend the life of roofs and improve the condition of patios and walkways Can be applied directly from the container or mixed with water and applied with a sprinkling can or pump-up sprayer