Features and BenefitsPenetrates at least 50% faster than the competition for less downtime and faster return to service.*Provides 3x greater protection from surface rust than most competitors for extended equipment life**Safe to use on metal, rubber and plastic partsIdeal for use on nuts, bolts, threads and locks50-state VOC compliantWD-40 SpecialistPenetrant is 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. It is a low odor formula that 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. Now the job is even easier with our proprietary 8 flexible straw that bends and keeps its shape, allowing unlimited access to hard-to-reach places.