Weber 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. It is an effective painting medium when used within recommended guidelines. Not recommended for use with Damar Varnish or crystals.Gallon size Turpenoid Natural can not be shipped to California.