3M Cloth 977F is designed to provide efficient surface finishing on a variety of metals. Made with 3M ceramic grain attached to a water resistant polyester mix cloth backing using a resin bond, this cloth can aggressively sand and finish surface without discoloring the metal. Can be used in either wet or dry applications. - Ceramic aluminum oxide blend offers excellent cut rate and life for better performance. Durable resin bond resists deterioration from heat, extending the life of the abrasive cloth.