HD Coolant Leak Repair, 472ml | HGV Radiator, Block & Head Gasket Sealant
Product ID: 48499169
🔧One-step, no draining needed
🚜Heavy-duty, industrial strength
⏱️Seals leaks in minutes
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🚀 Seal leaks like a pro—fast, permanent, and hassle-free!
K-Seal HD is a professional-grade coolant leak repair solution that permanently seals leaks in radiators, head gaskets, freeze plugs, blocks, heater matrixes, and water pumps of heavy-duty vehicles. Its unique one-step formula works within minutes without draining or flushing, compatible with all antifreeze types, and is independently verified to meet ASTM D3147 standards. Trusted globally by mechanics, it offers a cost-effective, non-corrosive fix that enhances engine cooling system reliability and performance.
| ASIN | B004W6I7MQ |
| Best Sellers Rank | 3,511 in Automotive ( See Top 100 in Automotive ) 51 in Fillers, Adhesives & Sealants |
| Brand | K-Seal |
| Customer Reviews | 4.3 4.3 out of 5 stars (520) |
| Date First Available | 26 Mar. 2010 |
| Delivery information | We cannot deliver certain products outside mainland UK ( Details ). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. |
| Item Weight | 520 g |
| Item model number | K5516 |
| Manufacturer | K-Seal International Limited |
| Manufacturer part number | K5516 |
| Model | K-Seal HD Coolant Leak Repair |
| Package Dimensions | 19.3 x 10.67 x 4.83 cm; 520 g |
C**E
Brilliant product - Does exactly what it says - leak fixed
I was having sudden major loss of coolant, discovered a leaky expansion tank previously and had already replaced tank, but problem then worsened! Couldn't see any obvious leaks from the radiator, and all hoses were sound, unlikely to be the water pump as the problem would have been worse, so likely a gasket or seal somewhere being the cause of the leak. Added 1 container of K-Seal HD, and within an hour or so of the engine getting up to temperature, the leak was fixed with no further loss of coolant. I have put over 3000 miles on the car since adding K-Seal, and no further loss of coolant. Car is Audi A6 Allroad 3.0 V6 Diesel with c.100,000 miles on the clock. Bought another K-Seal to keep in the boot - just in case!
T**M
Always the go to item!
Ceramic & copper filaments binding well to stop leaks, works with all antifreeze types takes time to stop leaks so be patient..unless you have gaping holes, it will work
I**N
Ian
Did the job but I’ve lost heat in the heater matix
A**R
Handy
Very handy. Just what I needed. As described.
J**S
Does the jobs, just do it!
Amazing! I had quite a substantial waterleak on my 3 series Scania. But after trying this, the leak stopped within about 10 seconds of running the engine. One thousand miles later and still not a drop of coolant leaks out, absolutely amazing stuff. Further to this, the vehicle builds up to the correct temperature and stays there. It no longer overheats, like it did previously with the coolant leaks. If you've got a coolant leak, then this is definitely worth a punt.
J**R
Its better than nothing...
Seems to work though it take a while to become effective. We had a small leak from the seals on a still-tube radiator and it definitely fixed that, however it did not fix a weeping compression joint.
T**Y
good
good
I**M
Bad
Unfortunately, I don't recommend it.
M**I
Bien reçu fonctionne bien .metre le produit moteur chaud pour une meilleur réparation
M**M
all good fixed van
A**E
Unglaublich, funktionierte im SLK R170. Kühlwasser würde riechbar verbrannt. Nun ist Schluss ohne hik hak seit 12.000km+
N**Y
conforme à la description
P**O
Per me a funzionato alla grande dopo sei mesi non o più problemi di perdita di acqua
Trustpilot
3 weeks ago
2 months ago