3M™ Wetordry™ Abrasive Sheet 213Q is an abrasive sanding paper constructed on a light, A-weight paper backing and features a waterproof resin bonding to help prevent heat buildup. The aluminum oxide abrasive and waterproof backing make this paper an ideal product for sanding applications such as paint prep, sanding, sealer sanding, and solid surface finishing. - 3M Wetordry abrasive sheet 213Q is best suited for metal sanding and finishing thanks to its versatility and fast cutting abrasive material. Its flexible, A-weight paper backing provides smooth operation and durability and can conform to the shape of contoured parts for consistent finishing.