How does it work? Bar's Leaks proven and industry-leading chemical engineering finds the leak from the inside and uses chemical reactions to seal the head gasket leak properly again. It uses the antifreeze already in your cooling system so there is no need to drain, flush or replace any components.

Bar's Leaks Radiator Stop Leak Concentrate is specially designed to stop minor to moderate cooling system leaks and drips caused by normal cooling system wear and age. It works with ALL types and colors of antifreeze coolant and/or water.

the United States All Bar's Leaks products are proudly made in the United States. Based in Holly, Michigan, Bar's Leaks is an ISO 9001-certified company.

Chemical Composition/Ingredients

Bar's Leaks for Your Vehicle When you carefully follow the instructions for our engine, radiator or other stop leak products, there is no risk of damage. Always remember these points: Bar's Leaks stop leak products work for small to moderate leaks.

It depends. If the leak is mild to moderate, we've had customers run 10,000-50,000 miles with no further issues. If the leak is more severe, or on the edge of becoming severe, the repair might last a shorter duration. The advice we always give is to act at the first sign/symptom of a cooling system problem.

In the end, off-brand products could possibly damage your engine – we hear stories about it on a weekly basis. When you carefully follow the instructions for our engine, radiator or other stop leak products, there is no risk of damage.

Bar's Heritage Our company first revved up back in 1947, when it created the now-famous formula to stop a radiator leak from within. From that point to today, we continue to develop and evolve ground-breaking products that fix your car's critical components - safely, quickly and easily.

When you carefully follow the instructions for our engine, radiator or other stop leak products, there is no risk of damage. Always remember these points: Bar's Leaks stop leak products work for small to moderate leaks.

Certainly it has the potential to hurt your engine. If you have a blown head gasket, the Stop Leak can seep into, and clog, the lubrication passages. If the Stop Leak is sticky enough to plug a leak, it's sticky enough to coat the heat-transfer surfaces of your radiator.

This, reliably, will lead to further clogging, and it's why we specifically say our products should be installed into a clean environment. A chemical tool has a window of opportunity relative to the severity of the system damage. That is, if the leak is minor-to-moderate, we stand a good chance of being able to fix it.

So how long can you expect them to last? It depends. If the leak is mild to moderate, we've had customers run 10,000-50,000 miles with no further issues.

Be aware that many oil additives only provide a quick, temporary fix for small leaks. One-off emergency use will not necessarily do your engine any harm, but repeated use can do more harm than good. After a while excess additives often settle and clog up the system.

Yes, Bar's Leaks works with all types and colors of antifreeze coolant and/or water.

The Origin of Bars By Ancient Roman times, taverns were arising along roads and trade routes to meet the needs of travelers and soldiers. In England, up through the 11th century, public houses became places hold personal or business meetings.

The origin of the word 'Bar' is although dating back many years and associated with England for centuries is actually believed to come from an old French word 'Barra rod' or 'Barre', meaning barrier or rod, which is believed to come about as a result of the barrier separating those drinking from those serving the ...