Bar’s Leaks Radiator Stop Leak is formulated for emergency cooling system stop leaks and cooling system maintenance. For a full cooling system "tune-up," we recommend Bar's Leaks Original or Liquid.
Designed to seal minor leaks and drips in cooling systems up to 0.9mm in size. Bar's Leaks Radiator Stop Leak reduces or eliminates cavitation and contains buffing agents to keep the cooling system clean. It works on plastic, aluminum, and metal radiators in heater cores, engine cooling jacket, gaskets (including head gaskets), water pumps, and freeze plugs.
Keep Bar's Leaks Radiator Stop Leak in your emergency repair kit for those unexpected surprises and apply once a year to keep your cooling system protected from future leaks.
When reaching an external leak, it travels between the holes, gaps, and cracks and collects around the outer perimeter of the leak. Then builds inward, effectively sealing the leak. When exposed to air, it expands up to 15% in size, creating a tight seal capable of holding in pressures exceeding the maximum designed for cooling systems. Resulting in a strong seal without clogging your cooling system.
Bar's Leaks Radiator Stop Leak is best installed directly into the radiator or through the upper radiator hose. Run/idle the engine for 15 min. If no access direct access is available, install in the coolant reservoir and allow more time for the product to circulate within the cooling system.
The cooling system must be clean and free of other types of stop leak products. If it is necessary to remove other anti-leakage substances, or if the engine is over 2 years old or has traveled over 40.000 km, clean the system with Bar's Leaks Nural before using Bar's Leaks Radiator Stop Leak.