K-Seal Ultimate Head Gasket & Block Repair | Seal & Fix Coolant Leaks, 472ml

My trusty 1996 Diesel car of 17 years had to be sold due to the stupid and criminal extension of ULEZ (extended outside of the A406, by the London Mayor). Unfortunately the replacement vehicle I bought (it wasn't obvious at first) had a suspect blown head gasket , I thought the slight oil in the coolant was due to lack of maintenance/servicing by the previous owner & the broken seals on the oil cooler - there were no other head failure gasket symptoms . Also a co2 head tester test showed negative to head gasket issues.6 months after the purchase, the oil management light came on. Diagnostics showed cylinder 2 misfiring. I replaced all the spark plus & ignition coils, the light disappeared for a day , but came back again. My local garage took out the spark plug to cylinder 2 & used some sort of Otoscope to peer into the cylinder and saw coolant in there. He recommended K-seal. I read reviews and results seem to be 50/50, (I presume it depends on the seriousness of the gasket damage, how successful this treatment will be) . But for my Nissan Xtrail 2.5 litre Petrol engine this worked a treat. No vibrating when i started the car, the car ran smoothly. Whether K-Seal would last for a long time, I cant say, I had a road trip planned and wasnt going to risk it, but definitely as a stop gap till i got another car, this worked brilliantly. Its a gamble, but even for the price (£32) I would definitely sue this product again as a stop gab or to get me out of a tricky situation ie getting home rather than being stranded. As for the long term issues with having this in your engine, some say its ok, some say its not great for the cooler system, but for an older car my feeling would be 'why not use it, especially as a stop gab.

It didn't work at all for me, no difference whatsoever. The only difference is that now every time I open the radiator cap, there's so much foam and it's not cooling as well as before. I've tried to get a refund and they sent me a form to which you have to attach proof and among other things, they require you to give them a number which is apparently located under the bottle's cap. Obviously I haven't got the bottle anymore, let alone on the cap. Very disappointed. Money back guarantee means that they give you your money back if it doesn't work and not that they use loopholes to avoid it.

Good item, works

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.

Did not work for my Ford Focus 1.0 litre eco boost. I think this works with some cars and some cars it doesn’t.

Purchased this to remedy a coolant leak from cracked cylinder head in a large diesel engine. It worked immediately and stopped the leak, which otherwise would have been extremely expensive to rectify. If the repair lasts it will have been an incredibly good buy.

Stopped the coolant Leaking from Engine on a Landrover freelander 2005 Petrol with confirmed headgasket leak feel free to read on,I had headgasket failure symptoms on my car it's done over 115,000 miles and already had 2 headgasket replacements in it's life the last at 96,000 no way was I spending anymore big money on that thing I used a sniff test (separate purchase) and the fluid went yellow and a strange thing was the coolant was leaking slightly from mid Engine at the front it could even have a craked block or warping it's unusual to leak externally, I ran K seal and after seconds the leak has stopped and not losing anymore coolant. Luckily it's only needed for very short journey to work so I'll live with it like this until it dies i for sure wouldn't use it if I had a nicer car I'd get it fixed or if I was far from home I'd definitely use it to get back just read instructions carefully and there isn't really any risk of any blockages which had me worried.I'd say use if the car is beyond economical repair this has gave me time to save up

Installed by a trusted mechanic, followed instructions to the letter. Didn't work. In fairness, I was sceptical to begin with but hoped to save on head gasket repair. I will not use in future.