Achieve an ultra-smooth finish on your fine sanding jobs with the Norton T489 waterproof sanding sheet. Thanks to the water-resistant paper backing, you can sand wet or dry by hand or with a sanding block without quickly clogging the abrasive. The sharp silicon carbide P400 grit delivers a consistent and clean cut on paint, lacquer, primer, and steel workpieces. In addition, the flexible 230x280 mm sheet contours smoothly around curves and rounded shapes. This gives you full control when preparing automotive panels or painted surfaces for the final topcoat.