Medium No. 2 is a fat medium. It contains more oil than Medium No. 1. It should be mixed with the oil paint as the layers of painting develop. It has some of the properties of a glazing medium but it is preferable to use Art Spectrum 24-hour Glazing Medium if very thin veils of colour are desired. This product is marked as a dangerous/hazardous item. Due to this fact, extra freight charges will be calculated upon check out.