




🚗 Leak-proof your ride with the pro’s secret weapon!
Bar's Leaks HDC Radiator Stop Leak Tablet is a 60-gram chemical-based solution engineered to seal radiator leaks, inhibit rust and corrosion, lubricate water pump seals, and control electrolysis. Trusted by OEMs for over 30 years, it offers a quick, mechanic-free fix compatible with aluminum and metal cooling systems, ensuring your vehicle stays road-ready with minimal hassle.








| ASIN | B000KKND3Q |
| Best Sellers Rank | #117,725 in Automotive ( See Top 100 in Automotive ) #383 in Automotive Fillers, Adhesives & Sealants |
| Brand | Bar's Leaks |
| Brand Name | Bar's Leaks |
| Color | Brown |
| Compatible Material | Aluminum |
| Customer Reviews | 4.2 out of 5 stars 891 Reviews |
| Global Trade Identification Number | 00046087000069 |
| Included Components | Auto part, Automotive Accessories, Replacement and Performance parts |
| Item Dimensions | 19.1 x 12.7 x 2 centimeters |
| Item Form | Tablets |
| Item Highlight | Simple-to-use radiator treatment solution requiring no special installation equipment |
| Item Type Name | Radiator Stop Leak Dsply |
| Item Weight | 45 g |
| Item dimensions L x W x H | 19.1 x 12.7 x 2 centimeters |
| Item weight | 45 g |
| Manufacturer | Bar's Leaks |
| Material | Chemical-based |
| Material Type | Chemical-based |
| Model | HDC |
| Number of Items | 1 |
| Number of Packs | 1 |
| Part Number | HDC |
| Style | Compact |
| Style Name | Compact |
| Supported Standards | Radiator sealant standards for aluminum and metal compatibility |
| Surface Recommendation | Aluminum/Metal |
| UPC | 046087000069 |
| Unit Count | 60 Grams |
| Water Resistance Level | Not Water Resistant |
| Water resistance level | Not Water Resistant |
A**N
Don't use
Clogs the water pump
Y**I
Nice
Deller what great 👍
P**.
Function!
Function fragments! Utilise 2 tablets !
G**.
Eficaz
Muy bueno, detuvo la fuga que con otro producto no había resuelto
A**R
It works! Fixes the leakage on my newly installed water pump
Replaced the water pump on my Ford Taurus recently. I didn't do a nice job in scraping off the old gasket. So there was minor coolant leakage after the new water pump was installed. I can see the coolant dripping off the exhaust pipe right under the water pump after over-night parking. The leakage is not very much and not critical however it's very annoying. To re-do the water pump work, I'll have to remove the drive belt, tension pulleys, steel wheel power pumps, ..., and so on. I'm tired of these. So I give this Stop Leak a try. Instead of dumping the pills into the radiator, I simply dropped them into the coolant reservoir (container). To my surprise, it works! I don't have leakage on my new water pump any more. For $2.50, it really worth the money. It saves my day.
K**N
Works well for small leaks
I had minor coolant leak there would cost over a thousand to repair and I read that GM uses a product like this for small leaks. I added the tablets to my coolant and leak gone.
K**Y
Worked on my marine CAT 3208
I had to change head on my boat’s diesel CAT3208. Did not have any problems with the gasket, but head needed to be replaced. However, after the change I noticed small leak around the head gasket. Initially I purchased Bar’s Head Fix, but decided to call the company to get some tips on the installation. The company’s rep, after listening to the nature of my problem, stirred me towards Bar’s tablets. I followed the instructions on the amount, pre diluted tablets, and so far no leak. Just took a 50 mi trip down the coast everything looks good. I was little anxious initially, my engine is 40 years old and I did not properly flushed it, just changed coolant during head replacement procedure. I don’t know how long it is going to last, so far definitely worth it.
Trustpilot
1 month ago
1 week ago