Hi-Gear HG9048s Insta-Seal Head Gasket Fix Permanent Engine Block Sealer - 236 millilitres

No more water loss or mayonnaise in the oil filler cap !

Had what I believed was a head casket issue on the Jaguar X type. Previously took it to a garage that treated it with an unknown substance. The casket held for about 3 months before I had an issue again. Decided to do it myself with this product. So far so good, very little water loss, but not sure if that is the casket or just natural loss. Time will tell if this is a long term solution.

It didn't work all it done was block my pipes and exploded out of my expansion tank all over my car and engine bay I bought steal seal like a neon green bottle it worked first go don't buy this

Brilliant stuff and really does work. I tried it on my Landrover discovery and it stopped a leak that I suspect was a head gasket. I had a Volvo 940 Turbo that did have a head gasket problem. It worked on that too got another £10,000 miles out of it.

Easy to add to radiator overflow tank and engine stopped overheating within minutes highly recommend

This product is absolutely superb

Didn't work

It's ok

It’s a tiny little bottle... but it seemed to do the trick. A cracked engine block on a larger truck (and I mean a crack big enough to drain the oil out of the truck!!) was sealed with one teeny bottle. The fluids didn’t have to be emptied and there were a few other leaks too. My husband let it run and we were expecting smoke but nothing awful happened. Added oil, he took the truck out, came back and everything was normal and the truck retained its oil. I’m so far very impressed! Two weeks later, no leaks. All fluids are where they should be and you’d never know that the engine block had a crack big enough for me to put my fingers into! Why only 4 stars? Well, we haven’t taken it for any long drives yet and it has a funny hitch to it. It had problems before (obviously) and I don’t know if it’s from the cure or something else. Also, it might be getting better but no way to know until we go for a long drive and that’s kind of scary. I’ll update to 5 stars when we find out if the little gaspy sounds is going away or from some other issue. No matter what, I’m very impressed. When I saw how small the bottle was I thought that it would need more, but one seems to have done it! Definitely try this one over the other cures. This truck had been rode really hard when we got it and we didn’t know if it would ever go on the road. Pretty amazing ☺️

When dealing with additives, it's hard to tell who is selling snake oil, who isn't, and exactly which product actually works for the problem you have since some will pretend to fix things they don't by using specific wordings, etc. Well, this stuff definitely works for head gasket issues. Whether or not we're talking a true permanent seal is up for debate, but it for sure did the job. I don't see any more steam, and I'm not burning water or oil anymore. So I can say with some authority after trying this on 2 different vehicles that this actually does work. It's not "instant" and took a couple of days of normal driving, but it fixed the issue with all leaks in the radiator, heater core and head gasket between the 2 vehicles. It's night and day between this and K-Seal which basically did nothing but make the problem worse for me on my Bronco and the 2nd attempt on a Ranger didn't fix anything either. K-Seal advertises head gasket permanent fixes but them int he small writing under the flap goes on to explain it only fixes EXTERNAL head gasket issues and only other leaks that occur on the outside (meaning the leak is leaking outward), yet 90% of head gasket issues are internal. K-Seal also gummed up my thermostat; just be aware of what each product does and what you're trying to fix. I'm sure K-Seal might fix specific issues, but it didn't fix any of MY specific issues, even though they put it on the label that it fixes certain things. Bottom line; this does what it says.

Deuxième fois que j'achète ce produit et toujours aussi contente du résultat.

Still observing it's service

Ne marche pas dans mon cas, légère(s) fissure(s) dans le joint de culasse, apparition de vapeur dans le vase d'expansion et légère perte de ldr par le bouchon du vase d'expansion