Thinner. Replace petroleum distillate to thin your oil paints with a non-toxic version. Use Green for Oil thinner as you would use a classic thinner. Mix the product with your paint to make it more fluid and more suitable for the first drafts of your painting. Green For Oil is part of the "bio-solvent" family, a safer, greener alternative to traditional solvents. A range offering the same properties as traditional additives. Biosolvents are sourced from renewable raw materials, with a focus on biomass-based sources. They are products of natural origin: derived from plant-, animal- or mineral-based raw materials. They respect sanitary and environmental standards, as they have been created with sustainable development in mind. Their main features are the same as those of traditional solvents. The end product is just as effective.