Get exceptional finishes on a wide range of surfaces with Blue-Bak™ T414 fine grit paper waterproof sheets. Featuring durable B-weight waterproof latex paper backing and a strong resin bond, these sheets are flexible, long-lasting and environmentally stable so they're ideal for wet sanding applications. Expect outstanding finishes every time when this sheet is in your hand or attached to your sanding board, thanks to this paper waterproof sheet's sharp ANSI graded silicone carbide abrasive.