Gum Solution improves the brushability of glazes and renews old, thick glazes. Gum Solution also slows glaze drying time resulting in a more even and consistent application. Old, thick glazes can be brought back to their original creamy consistency by thinning the glaze with water first, then adding about a tablespoon of Gum Solution, or as much as needed to obtain good brushability without drag. Gum Solution will prevent glazes from drying fast and cracking. ACMI certified non toxic. Conforms to ASTM D-4236. After using AMACO Underglaze Pencils and Crayons, spray a diluted coat of Gum Solution all over the surface to seal the underglaze. Let it dry, then brush on a clear glaze. The Gum Solution seal will prevent the colors from smearing while brushing on the glaze.