Weber's Refined Turpentine is a naturally occurring thin, volatile pure gum spirit that is distilled from pine trees. The pure gum spirit is highly refined and cleaned by machines to produce a full strength turpentine that packs a powerful punch. You can use Weber’s Refined Turpentine as an oil painting medium or as a solvent to clean brushes. Pure Gum Turpentine blends sumptuously with oil based paints, varnishes and enamels and guarantees smooth, even application. Weber refined turpentine can be used to thin oil colors, or as a solvent for varnishes or varnish gums.