Use this Black Ice T214 fine grit paper waterproof sheet with your sanding block or sanding board for a great cut and long life thanks to its premium, heat-treated aluminum oxide abrasive. This sheet's strong resin bond extends its life in wet applications, and its high-strength B-weight latex paper backing is environmentally stable and flexible. This waterproof sandpaper resists curling caused by humidity and is ideal for commercial contractors and DIYers to use for finishing applications dealing with surfaces ranging from stainless steel and titanium to soft and hard woods.