Grumbacher Pale Drying Oil is a safe, non-toxic fast drying painting medium intended for artisans, hobbyists and decorative painters. Reduces the consistency of tube oil colors, accelerates drying time and increases flow and gloss. Use sparingly in conjunction with any oil painting solvent. Because excessive use causes severe yellowing and paint film embrittlement, this product is not recommended for fine arts applications. Cleans up with mild solvents. Made in the USA.