Apple Barrel Pouring Medium is ideal for use with any Apple Barrel acrylic paint to create the perfect paint for your pouring projects! Create fascinating marbled and swirled effects by simply mixing equal parts pouring medium and Apple Barrel paint; the medium will not alter the adhesion or color of the paint once mixed! For indoor use only on wood, canvas, or other paintable surfaces. 7189E Apple Barrel Pouring Medium, 64 oz.