With the Norton T489 waterproof sanding sheet, you achieve fast and uniform surface preparation for your next finishing coat. The sharp silicon carbide P150 grit cuts cleanly through old paint, primers, and lacquer on steel, metal, glass, and plastic without leaving deep scratches. Thanks to the durable waterproof paper backing, you can sand wet or dry to prevent sheet clogging and tearing during heavy use. Measuring 230x280 mm, this flexible sheet easily conforms to curved contours and automotive body panels whether you use it by hand or with a sanding block.