Sennelier additives invite painters to explore their creative impulses, empowering them to alter the working characteristics of oil paint to suit their artistic needs. This oil medium allows you to change the texture of your oil paints while also uniting your composition with uniform effects. Turner Transparent Glazing Medium is used for glazing and finish. It gives transparency and lightness to the finish of your artwork. It does not have a noticeable impact on drying time.