A fast-acting penetrant with capillary action to penetrate deep into crevices, threads and seams to break the rust bonds that hold stuck parts together. WD-40 Specialist Penetrant Fast-Acting low odor formula works on contact to free rusted nuts, bolts, threads, locks, and chains leaving behind a protective layer that prevents rust and corrosion from re-forming. It is 50-state VOC compliant and safe to use on metal, rubber and plastic parts. * Penetrates rust to free up stuck, frozen, or seized equipment and parts * Safe to use on metal, rubber and plastic parts * Ideal for use on nuts, bolts, threads and locks * 50-state VOC compliant