When used as directed, Virucidal Anti-Bacterial H-42 Disinfectant will prevent the growth and transfer of bacteria from one cutting to the next, and will keep your instruments in very good working order. This product will not cause rust or corrode your expensive tools, or harmful vapors that will endanger your health. The only blade disinfectant with a Federal Patent, most H-42 products are EPA registered and approved. Accepted by the National Assoc. of Barber Boards of America. Cannot be shipped to California.