This 7-ounce jar of Powdered Binder is used in conjunction with Liquid Medium to make Modeling Glass. It's the same as the Powdered Binder in the Starter Kit, but a larger size with a better price per ounce! It’s part of a unique process that artists combine with liquid medium, water and their own powdered glass or frit. The resulting material has the consistency of clay, is smooth and easy to work with. It won’t stick to your hands or tools. The binder and liquid medium are food-grade and non-toxic.