---
product_id: 8435812
title: "Bar's Leaks Cooling System Radiator Stop Leak 16.9 oz."
brand: "bar's leaks"
price: "€ 23.69"
currency: EUR
in_stock: true
reviews_count: 13
category: "Bar's Leaks"
url: https://www.desertcart.it/products/8435812-bars-leaks-cooling-system-radiator-stop-leak-16-9-oz
store_origin: IT
region: Italy
---

# Thick liquid formula for deep penetration Lowers engine water temperature Seals radiator, freeze plug & gasket leaks Bar's Leaks Cooling System Radiator Stop Leak 16.9 oz.

**Brand:** bar's leaks
**Price:** € 23.69
**Availability:** ✅ In Stock

## Summary

> 🚗 Seal the deal before your ride feels the heat!

## Quick Answers

- **What is this?** Bar's Leaks Cooling System Radiator Stop Leak 16.9 oz. by bar's leaks
- **How much does it cost?** € 23.69 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.it](https://www.desertcart.it/products/8435812-bars-leaks-cooling-system-radiator-stop-leak-16-9-oz)

## Best For

- bar's leaks enthusiasts

## Why This Product

- Trusted bar's leaks brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact & Ready:** 1.2 lbs bottle fits easily in your toolkit for on-the-go fixes
- • **Easy Application:** Add directly to radiator or overflow reservoir with clear instructions
- • **Triple Leak Defense:** Stops radiator, freeze plug, and gasket leaks fast
- • **Trusted by Thousands:** 4.3-star rating from over 3,800 satisfied users
- • **Engine Cool Confidence:** Lowers water temperature to prevent overheating

## Overview

Bar's Leaks Liquid Aluminum Stop Leak is a powerful, easy-to-use concentrate designed to seal radiator, freeze plug, gasket, and heater core leaks. Its thick aluminum formula not only stops leaks but also helps lower engine water temperature, ensuring your vehicle runs cooler and safer. Trusted by thousands with a 4.3-star rating, this compact 1.2-pound bottle is a must-have for proactive vehicle maintenance and peace of mind on every drive.

## Description

AUTO_PART

Review: SUPER DUPER LIQUID GOLD (ALUMINUM lol) - IT REALLY WORKS! Hello ya'll, I was faced with a 750 dollar repair bill for a leaky radiator, Not a small leak either, within 10 minutes the radiator was 75% empty, so with that being said I followed instructions and within 30 minutes, NO MORE LEAK! So If you find yourself in the same boat I was in, I'd say give it a shot.
Review: Worked Fine On A Noticable Leak! - I bought this for my 2002 Dodge Durango which appeared to have a small leak near the bottom of the radiator. I noticed I was repeatedly adding a little coolant to keep the overflow tank measuring stick up to snuff. I didn't notice any major spotting, but in the past week had seen some coolant which had dripped under the engine. All the hoses, etc. checked out fine, but the leak had become noticeable. I bought one bottle and added it to the car. The bottle says to add it to the radiator, or lacking direct access through a pressurized cap to add through the overflow reservoir. I shook the bottle well. The fluid is a somewhat thick consistency. I followed the tips of a few people on-line and added most of the bottle in through the pressurized cap, then added less than a quarter of the bottle into the overflow. I capped the radiator and then ran the car for about 45 minutes. The bottle said 10-20 minutes but........ Anyway, the leak appeared to immediately stop. It has been over a week and I have not had to top off the coolant. I will update this review should anything change. Overall, reliable product from my experience.

## Features

- 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 radiator leaks
- Seals freeze plug leaks
- Repairs gasket leaks

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B002696FA2 |
| Best Sellers Rank | #7,514 in Automotive ( See Top 100 in Automotive ) #6 in Fuel Leak Detectors |
| Brand | Bar's Leaks |
| Brand Name | Bar's Leaks |
| Color | Gray |
| Compatible Material | Aluminum |
| Customer Reviews | 4.3 out of 5 stars 3,819 Reviews |
| Global Trade Identification Number | 00046087011867 |
| Included Components | 1 Bottle |
| Item Dimensions | 1.8 x 3 x 6.6 inches |
| Item Form | Liquid |
| Item Type Name | Liquid Aluminum Radiator and Heater Core Stop Leak |
| Item Weight | 1.2 Pounds |
| Item dimensions L x W x H | 1.8 x 3 x 6.6 inches |
| Manufacturer | Bar's Leaks |
| Material | Plastic |
| Material Type | Plastic |
| Model | 1186 |
| Number of Items | 1 |
| Part Number | 1186 |
| Style | 1 Pack |
| Style Name | 1 Pack |
| Surface Recommendation | Miscellaneous |
| UPC | 046087011867 |
| Unit Count | 1.0 Count |
| Warranty Description | No |

## Product Details

- **Brand:** Bar's Leaks
- **Item Weight:** 0.8 Pounds
- **Liquid Volume:** 16.9 Fluid Ounces
- **Material:** Plastic
- **Package Information:** Can

## Images

![Bar's Leaks Cooling System Radiator Stop Leak 16.9 oz. - Image 1](https://m.media-amazon.com/images/I/710LVf+KX5S.jpg)
![Bar's Leaks Cooling System Radiator Stop Leak 16.9 oz. - Image 2](https://m.media-amazon.com/images/I/71l9W0HcjyL.jpg)
![Bar's Leaks Cooling System Radiator Stop Leak 16.9 oz. - Image 3](https://m.media-amazon.com/images/I/41X0xUy+9EL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: My radiator leaking from the seam.  Slightly overheating.  Will this seal at the seam?**
A: It should,depending on how big the leak/crack is,the one on my semi truck was dripping big,half a gallon a day,I was worried bc that s a $2,000.00 repair,I bought it not expecting any results,since I had previously used Bars leak (the small silver bottle) and didn t work,so this was a prayer and a last hope, 5,000 mls later and not a leak,not extra coolant added,it is liquid aluminum,so it bonds to wherever the leak is and forms a sealing coat...I think of it as welding from the inside...I hope it works for you as it did for me,it really was an answer to prayer...I know I m a bit dramatic but it was.PS,try to follow recommended amount or as close as recommended,not much less and not much more,I used 2 bottles on a 11 gal radiator.God bless.

**Q: can it be used in a Tahoe plastic tank**
A: i used it in my volvo which has a plastic expansion tank and no problems. it won't fix big leaks but if you're losing just a little coolant over time and can't find the leak this is the stuff to use!

**Q: My volkswagen golf gti 2018 doesn’t have a radiator cap can i still put it in a coolant reservoir to seal my radiator leak?**
A: If direct access to radiator is not available, install in overflow tank. Please ensure overflow is pressurized before adding. 

DIRECTIONS

Allow engine to cool. Make sure engine is cool enough so radiator cap can be safely removed.
Shake well. Pour Bar’s Leaks Liquid Aluminum directly into radiator. One bottle treats systems up to 4 gallons. Use 1/2 bottle in 3 and 4 cylinder engines. TIP: If direct access to radiator is not available, install in overflow tank.
Fill radiator and overflow tank to proper level and reinstall radiator cap.
Drive/idle engine for 15 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 Blown Head Gasket Repair.
Leave Bar’s Leaks Liquid Aluminum in cooling system for continued protection.

If you have any other technical questions, feel free to contact our Technical Service Professionals at 800-345-6572 or if you would prefer you can use the contact us page on our website.

**Q: will this work on the head also?**
A: Try it...it's inexpensive.  Whether it works depends on the specifics of your problem.  I tried it on a 4 cylinder BMW with a new head and profile gasket and a slow leak.  It worked great.

## Customer Reviews

### ⭐⭐⭐⭐⭐ SUPER DUPER LIQUID GOLD (ALUMINUM lol)
*by K***E on June 27, 2026*

IT REALLY WORKS! Hello ya'll, I was faced with a 750 dollar repair bill for a leaky radiator, Not a small leak either, within 10 minutes the radiator was 75% empty, so with that being said I followed instructions and within 30 minutes, NO MORE LEAK! So If you find yourself in the same boat I was in, I'd say give it a shot.

### ⭐⭐⭐⭐⭐ Worked Fine On A Noticable Leak!
*by B***A on April 22, 2017*

I bought this for my 2002 Dodge Durango which appeared to have a small leak near the bottom of the radiator. I noticed I was repeatedly adding a little coolant to keep the overflow tank measuring stick up to snuff. I didn't notice any major spotting, but in the past week had seen some coolant which had dripped under the engine. All the hoses, etc. checked out fine, but the leak had become noticeable. I bought one bottle and added it to the car. The bottle says to add it to the radiator, or lacking direct access through a pressurized cap to add through the overflow reservoir. I shook the bottle well. The fluid is a somewhat thick consistency. I followed the tips of a few people on-line and added most of the bottle in through the pressurized cap, then added less than a quarter of the bottle into the overflow. I capped the radiator and then ran the car for about 45 minutes. The bottle said 10-20 minutes but........ Anyway, the leak appeared to immediately stop. It has been over a week and I have not had to top off the coolant. I will update this review should anything change. Overall, reliable product from my experience.

### ⭐⭐⭐⭐ It’s good not great
*by S***E on March 21, 2026*

It didn’t completely stop the leak but slowed it down dramatically and my car is no longer over heating.

## Frequently Bought Together

- Bar's Leaks Cooling System Radiator Stop Leak 16.9 oz.
- PEAK 50/50 Prediluted Antifreeze and Coolant for All Engine Cooling Systems
- Bar's Leaks 1109 Liquid Copper Block Seal, Intake and Radiator Stop Leak, 18 oz. | One Step, Safe for All Cooling Systems

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*Product available on Desertcart Italy*
*Store origin: IT*
*Last updated: 2026-07-04*