K-Seal Coolant Leak, 236ml | Multi-use Car Radiator & Head Gasket Repair Sealant

Perfect did the job easy

Put this in a Citroen DS3 1.6 vti a year ago as it had a small leak on the oil cooler. After a year the coolant has only started to drop again - ordered some more, better than removing the manifold etc!

I had quite a bad leak from the small internal radiator that warms air in the cab near the driver's feet. I had tried another product and even an egg, which usually works quite well, but the leak only partially slowed. When I used this product however, the reduction in the leak became noticeable and is almost gone now.

Good quality and as Described

Writing from the UK, in December 2022 Toyota Auris, 2.0D4D, 2008, 85,000 miles. Had developed a quite significant coolant leak from around the waterpump pulley area - enough to have to top up entire tank weekly. No noise however. With the engine running, I could see droplets of coolant being thrown out from behind the pulley (using a good torch). Tried the K-Seal - according to the instructions - which for me was half this little bottle. After just one drive (30 miles) - the leak had definitely stopped! Now my only concern is - obviously a chemical treatment can't fix a worn bearing (if it is - as opposed to merely a worn seal) - but I'm expecting it to make at least some noise before it's about to do anything catastrophic. A new pump from Toyota was surprisingly cheap (c.£150) - so I will change it out soon. But - where all I have is a worn seal - then this stuff really will buy you thousands of miles, if not tens of. And heck - with it circulating throughout the entire rest of the system - it is also preventive maintenence for any other types of leaks (say heater core).

Didn't worked as expected

Worked so goo, great value for the money

Very Good

Great product

Seems to stop leaking from plastic header of the radiator.

Fungerade mycket bra. Jag är nöjd. Bara att skaka burke jättenoga först. Sen hel i allt

efficace dès la 1ere utilisation. plus de problemes de fuite depuis. un miracle ? pour le prix cela vaut le coup de l'essayer plutot que d'engager de gros frais pour les réparations.

Excellent product. Worked wonders with my 2003 Volvo s60 with 261000 kms on the odometer. The engine head gasket had blown up causing water loss. K-seal sealed it in 20 minutes. After applying the fix I drove it for almost 100 kilometers and no water loss at all. Though I have to see how long it lasts. Six months since I used it and the car still runs great without issues.