Bar's Leaks 1186 Liquid Aluminum Stop Leak - 16.9 oz , Gray
  • Bar's Leaks 1186 Liquid Aluminum Stop Leak - 16.9 oz , Gray
  • Bar's Leaks 1186 Liquid Aluminum Stop Leak - 16.9 oz , Gray
  • Repairs gasket leaks
  • Bar's Leaks Liquid Aluminum Stop Leak seals radiator leaks; Seals freeze plug leaks; Repairs gasket leaks and heater core leaks; Lowers water temperature
  • Seals freeze plug leaks
  • Seals radiator leaks

Product information

Technical Details

Product Description

Bar’s Leaks Liquid Aluminum Cooling System 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. Contains Xtreme Cool which stops overheating and reduces water temperature. Liquid Aluminum is part of the next generation stop leak line. It is to safely and easily seal leaks in plastic, aluminum and metal radiators, heater cores, gaskets and freeze plugs. Works in cars, trucks, vans, SUV’s and RV’s. Use with all types of antifreeze including conventional green or blue (silicate-based) and extended life red/orange or yellow (OAT/ HOAT) antifreeze. For most vehicles leaks stop in only a few minutes. FUNCTION - Stop Radiator & Coolant Leaks DOSAGE -Use – 1/2 (half) bottle in a small cooling systems, such as 4 cylinders with no A/C. Use 1 (one) bottle for regular size systems, most 4, 6, 8 and 10 cylinder engines. Seals Radiator Leaks Seals Freeze Plug Leaks Repairs Gasket Leaks Repairs Heater Core Leaks Lowers Water Temperature


From the manufacturer

Heater core stop leak

Frequently Asked Questions

Can Bar’s Leaks Liquid Aluminum be installed in existing antifreeze coolant?

Yes, Liquid Aluminum is specifically designed to be directly added to the cooling system without having to flush out the antifreeze. It also can be used in water alone. But if using in water, it is recommended that another bottle of Liquid Aluminum be added to the system once antifreeze is installed.

Will it work in the new extended life antifreeze?

Yes, Liquid Aluminum works with all types of coolant including yellow, orange, pink, red, blue and green silicate based and non-silicate based OAT/HOAT antifreeze and/or water.

How long does it take to see results?

We recommend you drive/idle the vehicle for 10 to 20 minutes. In most cases the leak will be sealed instantly, but others will require up to 20 minutes. If the leak is not sealed in 20 minutes, a second application may be required or mechanical repair may be needed.

What's in it?

  • The two key ingredients in this product are Liquid Aluminum and Xtreme Cool.
  • Next-generation stop leak line that not only seals leaks, but also conditions the system.
Oil Leak Problem? Low Oil Levels? Hearing Loud Sounds from the Engine? Temperature Warning Light? Smoke from the engine?
Identify the Symptoms Black or dark golden brown spots or puddles beneath my car. My engine is reading low oil levels, but not sure it is leaking. I'm hearing a ticking or knocking sound coming from the top of my engine. I have a temperature warning light or temperature gauge is at high end. I'm seeing white smoke or steam coming from engine/hood
Best Solution An oil leak may start out small, but can lead to a unplanned costly repair down the road. Use Bar's Leaks Main Seal Motor Oil Leak Repair to stop leaks and continue on down the road. Bar's Leaks Rear Main Seal Repair Concentrate. Bar's Leaks Engine Repair. Bar's Leaks Cooling System Repair. Bar's Leaks Liquid Aluminum Stop Leak
Alternative Solutions Bar's Leaks Rear Main Seal Repair Concentrate Bar's Leaks Main Seal Motor Oil Leak Repair Bar's Leaks Main Seal Motor Oil Leak Repair Bar's Leaks Liquid Aluminum Stop Leak Bar's Leaks Cooling System Repair.
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Each individual Bar’s Leaks product is formulated and manufactured right here in the U.S.A. We’re committed to creating fast and affordable products that fit perfectly into your lifestyle and budget. Choose Bar’s Leaks, so you can discover just how simple automotive maintenance can be when you have the right tools.

Bar’s Leaks. The fastest, safest way to get your show back on the road.

Bar’s Leaks is more than just a stop-leak company

We are a team of enthusiasts and experts who create memorable experiences with each and every one of our customers. With nearly 70 years of experience in helping everyday automobile owners repair leaks, we have the track record of success and long history that demonstrates our commitment and passion to helping drivers of all experience levels. You’ll see that our passion shines through in everything we do.




Bar's Leaks 1186 Liquid Aluminum Stop Leak - 16.9 oz , Gray

$9.00  $4.00
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