Complete your wet metal, wood, fiberglass, and composite projects using this TufBak T461 medium grit paper waterproof sheet. This paper features a durable C-weight backing and resists curling from moisture and humidity. With the ANSI graded silicon carbide abrasive on this sheet, your wet projects are cut fast and you can achieve a great finish on all medium material removal projects. The sheet's resin bond system also imbues it with extra flexibility and abrasive adhesion.