Dina Wakley Media-Glazing Medium. Ideal for extending open time of acrylic paints and creating layered glazed effects. Media Glazing Medium can also be used as a paint thinner and to increase paint transparency. Create layers of paint or add a glazed effect to mixed media projects. This package contains 1oz of glazing medium. Non-toxic. Acid free. Conforms to ASTM D 4236. Made in USA.