Designed for use on paint and primer, 3M™ Production Resinite Gold Sheets, 216U, are ideal for fine featheredging, for use during the final sanding step before priming, as well as sanding water-based finishes and bare wood. These sheets leave behind no residue, and feature 3M™ Gold Fre-Cut™ Aluminum Oxide that is long-lasting and provides a consistent finish. The 3M™ Paper Sheet 216U 02538 features 3M™ Gold Fre-Cut™ Aluminum Oxide Abrasive Material. These sheets are intended for dry sanding only. 3M™ 216U Gold Sandpaper lasts a long time and is one of the best for dry sanding. This 3M™ Paper Sheet leaves no residue, is great for sanding water based finishes, and features a resin-coated aluminum oxide paper. Used for sanding bare wood, coating removal, and between-coat sanding. This product is known for its fast cut rate, flexibility, and consistent results. Available in p800-P80 grades.