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

Well what ever I done with this it resolved the issue and has saved me over£800 for repair, works well, had no bother since applying it

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.

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.

stops leeks

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.

One cylinder was 20psi down on the others after use all cylinders are at the same pressureWorks v well

Tried to fix my leaking head gasket. Quite a minor leak, the car starts and runs well, but is putting combustion gases into the cooling system. Followed instruction to the letter and I'm afraid in my case, made no difference whatsoever. Expensive for what it is, a kinda gloopy jelly.

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.