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🛡️ Seal leaks, stop stress, and drive with confidence!
Bar's Leaks Liquid Aluminum Radiator and Heater Core Stop Leak (6 Pack) is a scientifically formulated additive designed to permanently seal coolant leaks in radiators, heater cores, gaskets, and freeze plugs. Featuring Xtreme Cool™ technology, it reduces overheating by lowering water temperature. Compatible with all radiator materials and all types of traditional or extended life coolants, it requires no draining of the cooling system, making leak repair quick, safe, and hassle-free.




| ASIN | B00BYS6YLQ |
| Best Sellers Rank | #10,359 in Automotive ( See Top 100 in Automotive ) #366 in Oil & Fluid Additives |
| Brand Name | Bar's Leaks |
| Color | Clear |
| Customer Reviews | 4.3 4.3 out of 5 stars (3,537) |
| Global Trade Identification Number | 10046087011864 |
| Included Components | (6) Radiator and Heater Core Stop Leak |
| Item Type Name | Liquid Aluminum Radiator and Heater Core Stop Leak. 6 Pack |
| Item Weight | 544 g |
| Manufacturer | Bar's Leaks |
| Manufacturer Part Number | 1186-6PK |
| Manufacturer Warranty Description | No |
| Material Type | Liquid Aluminum and Xtreme Cool |
| Model Number | 1186-6PK |
| Number of Items | 6 |
| Unit Count | 101.4 Milliliters |
Z**R
Must Try.
Looks like it worked. No more leaks.
A**R
Stopped leak
Stopped leak in the engine block. Good product. Bought 2nd time and used in lexus as a preventive measure for any future leaks or problems.
H**I
Genie in a bottle.
IT WORKS!! stops small leaks in any type of radiator with minimum effort, just follow the directions but don't forget to drain some coolant before adding the product (about 1 litre) then top up later.
B**D
يعمل على اغلاق الشقوق في دورة التبريد لكنه لا يغني عن الاصلاح اذا كنت تريد تأجيل الاصلاح استعمله لكن بالنهاية عليك اصلاح مكان التسريب
R**.
Effective
Good product
S**H
Perfect
Fixed my car leak
M**A
Doesn’t work on leaking hose. No bond oR seal
Doesn’t work
H**I
Ij
100 %100 Ok
S**I
I’d say it worked great, I did something very stupid, I had my van idling on my driveway for about twenty minutes or so and my neighbour saw smoke coming from it and alerted me, most of the fluid leaked out of the radiator and in the process it sprung a couple of leaks, went and checked on line with my very good friend the one and only Scotty Kilmer and Barr,s radiator stop leak is what he swore by, no regrets using it, most of the leaks are gone just a minor drip from what I believe is coming from the drain plug, glad I used Barr’s Stop Leak
H**M
جيد
E**R
SI ME FUNCIONO !! LO RECOMIENDO.
D**R
Worked great and great price
E**E
Had a minor leak coming from the bottom of my car radiator. Watched the video from the makers and used half a bottle for a 2009 Nissan Sentra and 3 days later no leak visible and the overflow bottle not drained, fingers crossed. Update: 5 months on and no leak. Highly recommend for minor leaks.
Trustpilot
1 month ago
2 months ago