Bars Leaks Radiator Stop Leak Concentrate is specially designed to stop minor cooling system leaks and drips caused by normal cooling system wear and age. Product Features: Stops & Seals Coolant Leaks Seal Leaks in Radiators, Gaskets, Heater Cores, & Freeze Plugs Works with ALL types and colors of antifreeze coolant and/or water SPECIFICATIONS Antifreeze Type Compatibility: Compatible with all antifreeze Contains Corrosion Inhibitors: No Contains Ethylene Glycol: No Contains Lubricant: No Contains Stop Leak: Yes Manufacturer Warranty Compatibility: Yes Radiator Material Compatibility: All Recommended Change Interval: 12000 mi Non-Toxic: No Boiling Point at 50/50 Mixture: 212 Deg. C