K-Seal Ultimate

The product works great, had to unfortunately use it on my stage 3 3l a5 diesel. Temporary fix, While while I rebuild the engine, but it worked immediately, I have tried others, steel seal etc. None worked except this, however, I do believe it did damage the thermostat, but I can't say it definitely was this. Recommend.

Works really well. Just make sure you really warm the engine fully. Great item. Fast delivery. Well packaged. Highly recommended 100% good

But in my case it did not work fully. I think it reduced the problem somewhat but I can't dismiss it entirely as I can't be certain what was causing my problem. At the price, it's got to be worth a try.

Head gasket started to leak on my Mercedes Sprinter, gasket was not leaking directly but radiator pressurising when engine under heavy load causing water to be expelled through radiator pressure relief cap, (cap tested and found to be in good condition) I purchased a radiator pressure tester to check for leaks and found none, tester would hold pressure over night so came to conclusion that head gasket must be starting to leak under load. Thought I would try Kalimex head gasket sealer as it stated that this was one of the problems it could perminamtley fix, £30 per bottle later I added the Kalimex as per instructions, set off on test drive, 5 miles later water level was low again, product did not work. Am now sending for refund as per guarantee.

Did the job, car back on the road, seams to have sealed the leakse

Not sure how many stars to give this?? I have a BMW X5 4.8is V8 Petrol. I am losing water - but only a tiny bit poss 0.25L each week. Slight steam from exhaust when idling but again not much & hard to tell if coolant. No water in oil & no oil in water... I can only imagine it must be a tiny head gasket problem. Mechanic says no leaks. Car still drives like a dream. I have dosed the engine with one of these and given other positive reviews you would think that it would have done the trick? Maybe with the engine size I need 2 lots - however do not want to waste another £24 if it does not do the trick - really stuck - any wisdom on here? also noticed product says money back if it does not work - I wonder how to invoke that if I buy another and no joy? M

Had a coolant leak, poured this stuff in, drove about few times, leak was gone. I had been topping up coolant and I would hear a chugging sound ( where air would be getting in from the leak), when I poured this stuff in there was 2 chuggs and then it stopped, this stuff basically starts working right away

Yes it does what it ment to do for the Gasket in your car

Ho prima messo a livello l'acqua nella vaschetta a motore freddo, ho tolto la quantità d'aqua dalla vaschetta pari al prodotto, ho versato il prodotto nella vaschetta , ho avviato il motore METTENTO LA STUFA A CIRLCOLO ARIA CALDA , ho fatto riscaldare da fermo il motore fino a 80 gradi poi ho circolato per 3/4 km . ho spento e fatto raffreddare 5/6 ore. dopo di che ho usato la vettura regolarmente. IL PRODOTTO HA FUNZIONATO. La vettura è una Fiat stilo SW 140cv Multijet con 450.000 aveva soffiatura alla testata che mi consumava circa 150ml di acqua ogni 100 km (un bel bichiere di acqua) cacciando fumo bianco dalla marmitta. Ora dope Tre giorni ho percorso circa 560 km NON CACCIA FUMO BIANCO NE CONSUMA PIU ACQUA: al momento va benissimo non so quanto duri . comunque ho rimandato la rottamazione!!!

Subaru Outback 2.5 l anée 2000, 210.000 km. Elle perdé l’anticongelant par la joint de culasse en grande cantité (odeur, fumée dessous le capot). J’utilisé K-Seal Ultimate et le problème a été corrigé. 3 semaines plus tard il n’y a le moindre symptôme du problème.

Good product work on my car now .now to gas prblm everthing stop

La verdad que ha funcionado tenía un poro, le echamos el líquido hicimos 25 km como nos recomendaron y de verdad que lo notamos el coche tiraba mucho mejor, fácil de poner.

Head gasket and it worked