WD-40 Specialist Long-Term Corrosion Inhibitor, 6.5 OZ [6-Pack] The formulation in this corrosion inhibitor helps coat metal parts to lubricate and protect against rust and corrosion. Blocks rust and corrosion for up to 2 years when used indoors and for up to 1 year when used outdoors Recommended for preventative maintenance or for protection in corrosive environments, such as highly humid atmospheres Included straw creates a precision stream of lubricant for controlled application and fastens to the notched cap for secure storage Non-drying lubricant does not run and says where you spray it. 50-state VOC compliant and NSF Category A7