United glazes provide a wide color palette for your classroom. The non-flowing characteristics are great for almost any decorative technique. For best results, apply three coats to fired Cone 04 bisque. Glaze maintains a tough, durable and craze-resistant surface when properly fired to Cone 05, but can be used for high fire applications up to Cone 6. With easy cleanup, this glaze line is ideal for use in the classroom or studio. Food safe and lead-free. Pint jar. Gray. AP Seal, non-toxic.