Glazes provide a wide color palette for your classroom, at an excellent value. The non-flowing characteristics are great for almost any decorative technique. Apply three coats to fired Cone 04 bisque. They maintain 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, these glazes are ideal for use in the classroom, studio and other institutions. Food safe and lead-free. Pint jar. Gray. AP Seal, non-toxic.