WD-40 300035 Specialist Long Term Corrosion Rust Inhibitor, 6.5 OzProtects metal parts, blocking rust and corrosion for up to one year outdoors and two years indoors. Our anti rust spray is ideal for both preventative maintenance and use in extreme environments such as high humidity. Safe to use and 50 state VOC compliant, it provides non drying protection that stays where you spray it. Size: 6. 5 ounce Safe to use Protects metal parts, blocking rust and corrosion for up to one year outdoors and two years indoors