American Journey Acrylic Matte Medium - 128 oz.American Journey Acrylic Mediums are high quality mediums that add more body to your acrylics and enables impasto techniques, extends color volume or adds transparency. These acrylic mediums hold peaks and textures while offering incredible dimension to your artwork. Non Hazardous. Conforms to ASTM D4236. Matte Medium Mix Matte Medium with acrylic colors to extend paint, alter sheen to a non reflective surface and increase flow. Permanent wax like