Apply to greenware or bisque to "resist" application of glaze, slip and underglaze Wax Resist is Non Toxic. This wax emulsion, when applied on greenware or bisque as a method of decoration, "resists" application of glaze, slip and underglaze. Available in pint or gallon jars. Wax Resist now has a coloring agent to make it easier to see during application. The color will burn off during firing.