Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz
Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz
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Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz

4.6 stars out of 411 reviews
(4.6)|
411 ratings
Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 ozBar s Leaks Liquid Aluminum Radiator Heater Core Stop Leak Antifreeze Coolant 16 9 oz12 pack Bar s Leaks Liquid Aluminum Radiator Heater Core Stop Leak Antifreeze Coolant 16 9 oz6 pack Bar s Leaks Liquid Aluminum Radiator Heater Core Stop Leak Antifreeze Coolant 16 9 oz3 pack Bar s Leaks Liquid Aluminum Radiator Heater Core Stop Leak Antifreeze Coolant 16 9 oz
Pack Size:Single

Key item features

  • Leak Prevention: Stops coolant leaks in radiators, heater cores, gaskets, and freeze plugs.
  • System Conditioning: Contains Xtreme Cool to prevent overheating and reduce water temperature.
  • Universal Compatibility: Suitable for all vehicle types and works with all traditional and extended life coolants.
  • Easy Application: No draining required; seals leaks instantly in most vehicles.
  • Material Safety: Safe for use with plastic, aluminum, and metal (copper/steel) components.
  • Product Size: Comes in a 16.9 oz bottle, ideal for single use or multiple applications.
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Current price is $8.4850.2 ¢/fl oz
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Columbus, 43215
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Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz $8.48 50.2 ¢/fl oz

Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz
current price $8.48
50.2 ¢/fl oz

Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz

4.6 out of 5 Stars. 411 reviews

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Customer ratings & reviews

4.6 out of 5 stars
stars411 ratings252 reviews
How item rating is calculated
  1. 5 stars78% (320)
  2. 4 stars12% (50)
  3. 3 stars4% (16)
  4. 2 stars2% (8)
  5. 1 star4% (17)

Reviews summary

Pros
  • : Stops leaks and overheating issues in various vehicles.
  • : Offers lower cost compared to similar products.
  • : Forms a seal to stop leaks in the radiator or cooling system.
Neutral
  • : Can effectively seal small leaks, but may damage certain radiator materials.
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Showing 1-3 of 252 reviews

Sep 27, 2025
LSinCO
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

IT WORKS!

I admit it. I was skeptical. But I decided for the price I might as well try it. I followed the instructions exactly and after idling for 15 minutes, there was no longer a radiator leak! Unbelievable! My leak was in the reservoir so I could see it every day. I would also get constant reminders from my vehicle telling me to add coolant. That all stopped once I added this product. Almost 30 days have gone by and still no problem. Highly recommend.

Helpful?212DE4XJPW0522087044
Dec 1, 2025
Erin
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

I had a small antifreeze leak. Couldn't see it or find it but could smell antifreeze in the car cabin but not the exhaust. Put 2/3 of a bottle of this and it fixed the leak with no adverse impact on car radiator performance or car heat.

Helpful?212DE4XJPW0522087044
Jan 4, 2026
Brian
Top Reviewer
Item details
Multipack quantity: 1
5 out of 5 stars review

Verified Purchase

Stopped the radiator leak

I had a radiator leak but no time to replace the radiator. The stop leak did a good job sealing the leak until I had time to replace the radiator.

Helpful?212DE4XJPW0522087044