This is an all-natural thinning agent made from gum turpentine by ProNature for a natural, safe application. It works to clean all kinds of paint brushes, rollers, cleaning cloths, equipment and surfaces as well as to thin out other ProNature products such as their Wood Paint. Plant Turpentine is almost a must have when using ProNature coatings as it is perfect for cleaning scratches etc. on varnished surfaces that need to be spot repaired. Gum turpentine is also the thinner of choice for artists for oil mediums and is the best solvent for natural resins, readily dissolving most natural varnish resins.