skip to main content

Cooling System Radiator Stop Leak

Cooling System Radiator Stop Leak

Bar’s Leaks® Original Cooling System Radiator Stop Leak seals internal, external, and coolant-to-oil leaks. Works safely and effectively on plastic, aluminum and metal radiators, heater cores, blocks, heads, gaskets and freeze plugs. Compatible with both conventional silicate-based and extended life (OAT/HOAT) antifreeze, all types and colors. Can also be used in straight water. Pre-dissolved for easy installation. Also lubricates water pump seal to protect against potential future problems.

  • Protects the Entire Cooling System
  • Stops Current & Future Leaks
  • Helps Control Electrolysis
  • Use on Cars, Trucks, SUVs & RVs

No Automotive Expertise Required

Product Details

Product Number: 1199 Dosage: Use one bottle for 6, 8 and 10 cylinder gas or diesel engines. 3, 4 and 5 cylinder engines, use ½ bottle. One bottle treats systems up to 4 gallons. For larger systems use one bottle for every 3 gallons of cooling system capacity. Size: 11 OZ

Bar’s Leaks Cooling System Radiator Stop Leak is the next generation of our award-winning stop leak tablets. This formula features pre-dissolved tablets to make installation simple – no special expertise required. This product has been lab-proven to inhibit the formation of rust and scale, neutralize pH imbalance, control electrolysis, lubricate and seal internal, external, and coolant-to-oil leaks.

This is an advanced version of the same technology that’s been used on the assembly line by OEM automakers around the world for 75+ years. This new pre-dissolved solution is the result of listening to our customers asking for an easy-to-install product that delivers the results Bar’s Leaks is known for.

Works safely and effectively on plastic, aluminum and metal radiators, heater cores, blocks, heads, gaskets and freeze plugs. Compatible with both conventional silicate-based and extended life (OAT/HOAT) antifreeze, all types and colors. Can also be used in straight water.

Imagine having the ability to mend radiator leaks from the inside, quickly getting you back on the road. That’s exactly what our dedicated team of product engineers had in mind when creating Bar’s Leaks Radiator Stop Leak. This is the evolution of one of our most popular products ever.

Effectiveness, Affordability, and Usability – All Rolled Into One!

Bar’s Leaks Radiator Stop Leak offers a true triple threat. It offers unmatched effectiveness, ensuring your radiator is back to its prime condition with zero leaking problems whatsoever. But it goes beyond that. We understand the importance of affordability and usability, so we’ve got you covered there, too.

No Automotive Expertise Required

You don’t need to be a mechanic or enthusiast to use this product. We’ve made the process so simple that anyone can do it. Repairing radiator leaks has never been easier – no specific knowledge required.

Revive your cooling system with Bar’s Leaks Radiator Stop Leak – the ultimate solution for radiator leaks.

Find Near You