Liquitex Slow-Dri Blending Gel 16 oz. Liquitex Slow-Dri Blending & Painting Medium is available in both fluid and gel formulas for easy working under varying conditions. These unique formulations provide superior surface blending and increase working time by up to 40%. Any amount of medium can be mixed with acrylic color. Both forms of Slow-Dri Blending & Painting Medium are clear, flexible, non-yellowing and water-resistant when dry.