DRYWALL SCREENS 100-GRIT|Norton Abrasive’s WallSand drywall sanding screens are used for sanding drywall compound and patching plaster, prior to priming. This waterproof screen resists clogging because of its open mesh design, and can be rinsed and reused over and over again. Available in 80-grit (Coarse) and 100-grit (Medium) 4-7/16” x 11” sheets, in packs of 25.