Use this Blue-Bak T414 fine grit paper cut waterproof sheet with your sanding board or sanding block for finishing in wet applications, where its ANSI graded silicon carbide abrasive and strong resin bond provide exceptional finishes. Its high-strength waterproof latex paper backing is flexible and remains environmentally stable, resisting curling in humid situations. Great for commercial contracting and home improvement when used on metals such as brass or bronze, hard and soft carbon steels, aluminum, hard and soft woods, and 300 series stainless steel.