A heavy-bodied purified oil that is thicker than regular linseed oil but not as thick as stand oil, Grumbacher Sun-Thickened Linseed Oil is designed for use in preparing oil painting mediums. It exhibits an excellent resistance to yellowing and is extremely flexible. Use Sun-Thickened Linseed Oil to improve flow and increase gloss. Pre-dilute it with Pure Gum Spirits of Turpentine, Grumtine, or Odorless Paint Thinner