Solvent-Free Gel gives colours more flow and transparency yet holds the shape of your brush mark. Solvent-Free Gel has a moderately fast drying rate and increases gloss. Made from safflower oil and alkyd resin, Gamblin Solvent-Free Gel is non-toxic and contains no Gamsol or petroleum distillates. To ensure proper drying of paint layers, Solvent-Free Gel should be used in moderation with oil colours. No more than 25% by volume. To avoid wrinkling, apply mixtures of Solvent-Free Gel and oil colours thinly.