Bars Leaks Cooling System Repair is scientifically formulated to stop coolant leaks, thereby reducing antifreeze loss, while correcting other cooling system problems helping to prevent costly repairs and breakdowns. In addition, Cooling System Repair contains Xtreme Cool which stops overheating and reduces water temperature. Works on all 4, 6, 8, and 10 cylinder vehicles and in any gasoline, turbocharged and diesel engines. Use with ALL types and colors of antifreeze coolant and / or water. For most vehicles leaks stop instantly. For many vehicles, this is your last change before paying an expensive repair bill or replacing the vehicle.