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🚗 Seal the Deal with K-Seal!
K-Seal ST5516 HD is a revolutionary one-step coolant leak repair solution designed to permanently seal leaks in your vehicle's cooling system. Weighing just 540g and compactly sized, this eco-friendly formula is compatible with all coolant types, ensuring your vehicle stays on the road longer without the hassle of repeated repairs.








| Manufacturer | K-Seal |
| Brand | K-Seal |
| Product Dimensions | 14.99 x 10.41 x 4.83 cm; 540 g |
| Item model number | ST5516HD |
| Manufacturer Part Number | ST5516 |
| Manufacturer | K-Seal |
| Item Weight | 540 g |
A**R
It really worked and saved a lot of money
There was a crack in head gasket of my car and coolant was leaking from there. Results in engine overheating. I added Kseal HD in in coolant and I had driven 5000 KM after that and crack is healed hence no overheating. Authorised service centre had asked to change the head gasket , that could have costed me around Rs. 75000. Local mechanic suggested to weld the crack. That too have costed around Rs. 20000. But Kseal costed me only Rs. 3500. And it really worked for me.
M**N
No use for coolant pump mild leaks
It s not sealing coolant pump mild leaks.. I can only seal radiator leaks, not in other places- saying by my own experience.. if coolant pump leaks, u better repair it instead of wasting on it..
H**I
Only temporary fix
It fixed the problem only for 2 months or 1000kms on drive,i use s300 2004 model
P**E
It worked!
It worked! Fixed my Chevy Cruze leak!. Had paid $$$$ to the mechanic with no results...
N**L
Honestly worked great for my neighbour
My neighbour swears by it. Says it fixed the leak on his truck perfectly and that was a year ago and the fix is still holding up! He only used half the bottle too so he still has the other half left. We however did not have as much luck but that was our own fault! We had a small leak at first, if we had known about this product and used it then, I feel like it would have definingly solved our problem! But we unfortunately ran the truck to the point where all the anti-freeze leaked out because we had bad head gaskets and it over-heated the engine and then unfortunately this couldn't fix the major problem we created. I would definitely recommend this if you have a coolant leak, use it early it will definitely help!
A**N
Very effective with intake gasket coolant leak
I had an unsatisfactory result with one of my cars I earlier reviewed. However, I had a visible gakset leak between the plastic intake manifold and cylinder head in 2007 Town Car, and was about to remove it for servicing until I thought, let me give K-Seal another shot since I had a small quantity left. The result was magic! The leak is gone, and been running dry and clean for a month now.
A**O
Gran sellador
Funciona y es fácil de usar
D**G
This bar none the best stop leak
I have 2015 long nose Peterbilt. Had a slow cold leak from the bottom of the radiator (only would leak as the engine cools down) then I would have to add about 1 litre of coolant the next morning. After I added this product a few weeks ago, I’ve added nothing and the coolant level is still at the top. Excellent quick fix rather than new radiator.
Trustpilot
2 weeks ago
3 days ago