Abstract: Solvent formulations used in thinning oil-based resins and in cleaning equipment contaminated with oil-based resins include mixtures of constituents with low-, or no-toxicity and flash points generally considered to be above flammability levels. The formulations are compatible with such resins and further have drying characteristics suitable for most users. The solvating power and drying characteristics of these formulations are equivalent to turpentine and mineral spirits, but without the safety concerns associated with those thinners. The formulation components of the present invention include propylene glycol ethers comprising no more than 60% by weight of the solvent mixture, no more than 10% by weight of an isoalkane compound, and no more than 30% by weight of an oxidizing oil, and no more than 30% by weight of an odor-masking compound, preferably d-limonene.