Made from naturally refined linseed oil, a derivative of flax seed, 4Cats Linseed Soap safely cleans and conditions all of your artist brushes. Use for all types of brush hair, from sable to synthetic. Great for cleaning hands, floors and work surfaces! For a greener studio and well-cared for artist tools. 100% natural, non-toxic and virtually odourless! 150ml Directions: lather hands or working tools with soap and rinse with water.