WD-40 11 oz. Specialist Rust Release Penetrant Spray. It frees corroded nuts & bolts, penetrates rust, and is fast acting. It penetrates into tight crevices, threads & seams to break the bonds that hold stuck parts together. It helps prevent rust & corrosion from re-forming & leaves behind a lubricating layer. It is made with Blu Torch Technology, a unique blend of solvents, metal working fluids, & surfactants. It is safe to use on plastics, rubber, & metal. It is 50 state VOC compliant.