K-Seal ST5501 Multi Purpose 1 Step Permanent Coolant Leak

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.

I had a leak wasn't detectable, it drove me crazy, no white smoke and no sign of leak, every week i had to top up around 200ml coolant, even at garage wasn't found, and this little magic did stop the leak almsot a month and half no issue till end of July ++ Edit by August beginning Oil mixed with coolant , looks heat exchanger inner issue hop not followed by usage of this item!++ Edit Sep August End coolant pump stopped working, and thermostat and leak from Radiator after heat start to go up, unsure if system clogged, leak was mostly by Radiator damage but not visible because evaporated due engine heat and air flaw!

It killed my coolant leakage

Been 1 week, leak reduced. Hope will solve on long run too.

My car's engine water was needed to get refilled once in a week(I drive the car everyday almost 15km). I fed up and finally bought this product. It was my last chance before visiting the garage. I have tried this sealer with my car and amazingly it worked. I saved 1000$ by paying only 50$. Thanks.

It messed up something with my car, within 2 days my radiator fan and cooling fan resistor was blown out Never add something to your car system it will eventually ruin the car I ordered on the basis of rating so dont get fooled with product ratings

Poured in my Chevy Cruze reservoir tank and worked. Past 2 weeks no visible leakage of coolant yet

didnt fix the leak

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.

I had observed oil leak signs in the coolant, Probably faulty oil cooler gasket or Engine head gasket. I poured this liquid to the radiator and drove my Thar crde for almost 30minutes. Next day had gone for 400kms drive as well. No further oil leakage. Coolant looks clean now. Its been almost 3 weeks now. Oil mixing with coolant has stopped perfectly.