Dina Wakley Media Glazing Medium 1oz Tube – Media Glazing Medium is a slow drying medium ideal for extending open time of acrylic paints and creating layered glazed effects. Media Glazing Medium can also be used a a paint thinner and to increase paint transparency. Create layers of paint or add a glazed effect to mixed media projects. Acid free, non-toxic. Available in 2oz tubes and 4oz jars; prices vary.