Weber Turpenoid SLOW-DRY Oil Painting Additive, 236ml Bottle, 1 Each is used for thinning artist oils for a lean wash or modifying oil painting mediums with the intention of increasing dry time. Mix small amounts of Turpenoid Slow-Dry directly into oil color or medium to increase fluidity and dry time. Low odor, highly refined, water-clear mixture of petroleum distillates with no harmful aromatics. Very slow dry time and complete evaporation. Studio Safe: a mild solvent with a very high flash point of 200°F/93°C and a boiling point greater than 216°C meets C. A. R. B. low vapor pressure exemption for consumer products. Made in USA.