MARTIN/F. WEBER-Turpenoid Natural. Turpenoid Natural is an extraordinary brush cleaner which conditions as it cleans. It keeps brushes like new and restores aged brushes by removing dried hard paint. After cleaning brushes or tools with Turpenoid Natural; rinse with water. Unlike traditional solvents; Turpenoid Natural's unique blend of ingredients creates a strong solvent action. It is non- toxic; non-flammable oil paint cleaner. Safe for artists of all ages. This package contains one 236mL/8fl. oz container of Turpenoid Natural. Conforms to ASTM D4236. Made in USA.