Hero image 0 of (3 pack) Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz, 0 of 7
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(3 pack) Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz
(3 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 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 ozBar s Leaks Liquid Aluminum Radiator Heater Core Stop Leak Antifreeze Coolant 16 9 oz
Pack Size:3 Pack
Key item features
- Leak Sealing: Effectively stops coolant leaks, including those in heater cores, gaskets, and freeze plugs, providing a permanent seal for various cooling system components.
- Universal Compatibility: Designed for universal vehicle application and compatible with all types of traditional or extended-life coolants, including silicate and non-silicate based 50-50 mixes.
- System Conditioning: Beyond sealing leaks, this formula also conditions the cooling system, contributing to overall system health and performance.
- Overheating Prevention: Contains Xtreme Cool, an additive that actively works to stop overheating and reduce the water temperature within the cooling system.
- Material Safe: Safely seals leaks in plastic, aluminum, and metal (copper/steel) radiators without causing harm to the cooling system.
- No Draining: The product can be used without requiring the cooling system to be drained, simplifying the application process.
- Instant Sealing: For most vehicles, leaks are sealed instantly upon application of the product.
Generated by AI
Specs
- Product net content parent16.9 Fluid Ounces
- Compatible carsUniversal
- Vehicle fitment typeUniversal
- Vehicle typeCar, Sport Utility Vehicle, Truck
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.
Generated by AI
Current price is USDNow $14.94
You save $10.50
was $25.44$25.44
29.5 ¢/fl ozYou save$10.50
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Columbus, 43215
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This item includes:
- 3-pack of Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz
About this item
Product details
Bar’s Leaks® Liquid Aluminum Radiator & Heater Core Stop Leak is the best radiator stop leak money can buy. Scientifically formulated to permanently seal coolant leaks that are the cause of most overheating problems. Liquid Aluminum is part of the next generation stop leak line which not only seal leaks, but also conditions the system. Contains Xtreme Cool™ which stops overheating and reduces water temperature. It is guaranteed to safely and easily seal leaks in plastic, aluminum and metal (copper / steel) radiators, heater cores, gaskets and freeze plugs. It will not harm the cooling system, no draining is required. Use with ALL types of traditional or extended life coolant including yellow, orange, pink, red, blue, purple and green silicate based & non-silicate based (OAT/HOAT) 50-50 mix antifreeze, and/or water. For most vehicles leaks seal instantly.
- Bar's Leaks Liquid Aluminum Radiator & Heater Core Stop Leak Antifreeze & Coolant, 16.9 oz
- Stops Coolant Leaks
- Seals Heater Core Leaks
- Seals Gaskets
- Seals Freeze Plugs
- Vehicle Type- Universal
- Condition- New
info:
We aim to show you accurate product information. Manufacturers, suppliers and others provide what you see here, and we have not verified it.
Specifications
Product net content parent
16.9 Fluid Ounces
Compatible cars
Universal
Vehicle fitment type
Universal
Vehicle type
Car, Sport Utility Vehicle, Truck
Directions
Instructions
. Instructions:. ❶ Allow engine to cool. Make sure engine is cool enough so radiator cap can be safely removed. ❷ Shake well. Pour Liquid Aluminum™ directly into radiator. One bottle treats systems up to 4 gallons. Use 1/2 bottle for four cylinder engines. Tip: If direct access to radiator is not available, install in overflow tank. ❸ Fill radiator and overflow tank to proper level and reinstall cap. ❹ Drive/idle engine for 10 to 20 minutes. If leak continues, second application may be required or mechanical attention is needed. For severe leaks, like a blown head gasket, it is recommended to use Bar's Leaks Head Gasket Fix or Head Gasket & Cooling Sealant. ❺ Leave Bar's Leaks® Liquid Aluminum™ in cooling system for continued protection.
Safe Handling Instructions
DANGER: Opening the cooling system while the engine is hot or running may cause severe burns. NOTE: Cooling systems that are dirty or partially clogged should be flushed before usage. KEEP OUT OF THE REACH OF CHILDREN. CAUTION: Avoid contact with eyes. FIRST AID: In case of eye contact, flush immediately with water for at least 15 minutes. Do not take internally. After use, wash hands with soap and water.
Warranty
Warranty information
SATISFACTION GUARANTEED If not satisfied, purchase price will be refunded by mail. Send original sales receipt and UPC to: BAR'S PRODUCTS Dept. 207, PO Box 187, Holly, MI 48442
Warranty url
Warnings
Warning Text
DANGER: Opening the cooling system while the engine is hot or running may cause severe burns. NOTE: Cooling systems that are dirty or partially clogged should be flushed before usage. KEEP OUT OF THE REACH OF CHILDREN. CAUTION: Avoid contact with eyes. FIRST AID: In case of eye contact, flush immediately with water for at least 15 minutes. Do not take internally. After use, wash hands with soap and water.
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Customer ratings & reviews
How item rating is calculated
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.
Generated by AI
Customer images
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Showing 1-3 of 248 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?212DE4XJPW0515332350903
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?212DE4XJPW0515332350903
Feb 20, 2025
anonymous
Item details
Multipack quantity: 1
5 out of 5 stars review
Verified Purchase
2008 Nissan Versa - Heater core leak
So i read so many reviews and have not heard a bad one from people that actually used this product and actually knew their problem was a heater core leak. Autozone advised against it and i read some reddit mechanic forums that advised against it too but the majority were positive experiences. any negative comments sounded like they actually didnt know what was causing the leak in their vehicles and some that made no sense because they obviously dont understand the science behind this product. So regardless of the advisement..and therefore Instead of bypassing my heater core ...i tried this and wouldnt you believe BAM it worked immediately! heater core was leaking coolant directly into drivers side in 2008 versa.
Helpful?212DE4XJPW0515332350903
