Corry's Moss-B-Ware Moss & Algae Killer Granules, 3 lb. effectively control moss and algae on a variety of surfaces including roofs, patios, decks, driveways, and walkways. This versatile product is for use on wood composition, concrete, or metal surfaces, making it i for many outdoor applications. It can be applied in its dry powdered form or mixed with water for a liquid treatment, ing flexibility depending on your needs. The granules come in a convenient 3 lb. ready-to-use shake container, providing coverage for up to 3,000 square feet, ensuring efficient and easy application to keep your outdoor spaces clean and moss-. Model Number: