Kills moss, algae, and lichens quickly and effectively. Can be used on lawns and structural surfaces (roofs, decks, patios, sidewalks, fences). Fast acting, kills withing hours. Does not stain concrete or other surfaces. Size: 32 Oz. Concentrate or Ready To Use: Ready To Use Application Type: Hose End Product Form: Liquid Coverage Area: 500 Sq. Ft. Active Ingredient: 22.11% Potassium Soap This item is banned in the following states: AS, GU, PR, VI