Quickly releases rusted and corroded bolts, nuts, hinges and other frozen components. Extremely high solvency, low surface tension Enhanced penetration, lubrication Outperforms the competition in independent lab tests. Penetrates faster and deeper than most other similar products in the market place. Meets the California Air Resources Board (CARB) and Ozone Transport Commission (OTC),VOC regulatory guidelines. NSF registered category H2 #138554 (aerosol), #138553 (bulk) Inverta Spray Valve