United glazes provide a wide color palette for your classroom, at an excellent value. The non-flowing characteristics are great for almost any decorative technique. For best results, apply two coats to fired Cone 04 bisque, let dry and fire to Cone 06 or 05. When fired properly, the glazes maintain a tough, durable and craze-resistant surface. With easy cleanup, these glazes are ideal for use in the classroom or studio. Food safe when fired to recommended temperatures. Pint jar. Shiny Black. AP Seal, non-toxic.