Turpenoid Natural 8 fl. oz. Can. This product is non-flammable and nontoxic and can be shipped through the mail. Turpenoid Natural is an extremely effective nontoxic brush cleaner and gentle brush conditioner which rinses out with plain water. Brushes are reconditioned when cleaned with Turpenoid Natural. It is non-flammable, does not irritate skin or eyes and does not emit harmful vapors.