Gamblin Solvent-Free Fluid painting medium gives oil colors more flow and transparency. It has a moderately fast drying rate and increases gloss. Made from safflower oil and alkyd resin, Gamblin Solvent-Free Fluid is non-toxic and contains no Gamsol or petroleum distillates. To ensure proper drying and prevent beading-up of paint layers, Solvent-Free Fluid should be used in moderation with oil colors – no more than 25% by volume. To avoid wrinkling, apply mixtures of Solvent-Free Fluid and oil colors thinly. For underpainting, we recommend adding Gamsol to Solvent-Free Fluid.