Bar's Stop Leaks has millions of tiny particles to permanently seal internal and external leaks in plastic, aluminum and metal radiators, heater cores, blocks, heads, gaskets and freeze plugs. For preventative maintenance, use once a year to help guard against future leaks. The pre-dissolved liquid formula is available in two sizes. Part number 1194 (6 oz) is for 4-cylinder engines; use part number 1196 (11 oz) on 6 & 8 cylinder engines or for hard to stop leaks on 4-cylinder engines. Bar's Leaks Stop Leak Concentrate is compatible with both conventional green (silicate-based) and extended life red/orange or yellow (OAT) antifreeze. For most vehicles, leaks stop in only a few minutes.
Bar's Leaks offers a Full Line of Car-Care Products. Today, Bar's Leaks is much more than that original product that saved the crew of the Nautilus.
Bar's Leaks offer a full line of stop-leak products designed for radiators and cooling systems, engine oil, transmission, power steering and hydraulic applications. The Head Gasket Repair is the first premium cooling system stop leak specifically designed to chemically repair blown head gaskets and stop major leaks. Our line of REPAIR products offer improved system performance for high-mileage vehicles. These products, Engine, Transmission and Power Steering REPAIR, have been developed specifically for high mileage passenger vehicles to go beyond simply stopping leaks to actually improving system performance for longer vehicle life.