Gamblin Solvent-Free Fluid Medium is made from safflower oil and alkyd resin and contains no Gamsol or petroleum byproducts in its formula. It increases gloss without the noxious fumes of traditional oil mediums. Gamblin Solvent-Free Fluid Medium gives oil colors more flow and transparency and has a moderately fast drying rate. This fluid medium supports a wide range of painting techniques, allowing you to maintain optimal color, drying time and texture. 16.9oz glass bottle.