Bar’s Leaks 1186 Liquid Aluminum Stop Leak – 16.9 oz , Gray Bar?s Leaks Liquid Aluminum Cooling System Stop Leak is the best radiator stop leak money can buy. Scientifically formulated to permanently seal coolant leaks that are the cause of most overheating problems. Contains Xtreme Cool which stops overheating and reduces water temperature. Liquid Aluminum is part of the next generation stop leak line. It is to safely and easily seal leaks in plastic, aluminum and metal radiators, heater cores, gaskets and freeze plugs. Works in cars, trucks, vans, SUV?s and RV?s. Use with all types of antifreeze including conventional green or blue (silicate-based) and extended life red/orange or yellow (OAT/ HOAT) antifreeze. For most vehicles leaks stop in only a few minutes. FUNCTION – Stop Radiator & Coolant Leaks DOSAGE -Use – 1/2 (half) bottle in a small cooling systems, such as 4 cylinders with no A/C. Use 1 (one) bottle for regular size systems, most 4, 6, 8 and 10 cylinder engines. Seals Radiator Leaks Seals Freeze Plug Leaks Repairs Gasket Leaks Repairs Heater Core Leaks Lowers Water Temperature Bar’s Leaks Liquid Aluminum Stop Leak seals radiator leaks. Seals freeze plug leaks. Repairs gasket leaks and heater core leaks. Lowers water temperature. | Seals radiator leaks | Seals freeze plug leaks | Repairs gasket leaks | Special Shipping Information: This item cannot be returned and has additional shipping restrictions | TIP: If direct access to radiator is not available, install in overflow tank. All products are safe to use per the directions, proper dosage and in a clean system.