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If you use ULTIMATE for a Head Gasket repair and it and it fails to fix the leak get in touch to find out about our money back guarantee. For all our other brands if you have a repair that subsequently fails contact us for a replacement bottle.
Reviews 493
Graham
Dec 03,2020For the past week or so I have been having problems with car. No heating car chugging and drinking water like it was going out of fashion. Everything pointed to a blown head gasket. Loss of power etc. How ever I was told about k seal and because I had never heard of it I was dubious to use it. However curiosity go the better of me. I thought if I had a new head gasket it would cost a lot of money so the small amount I spent on k seal wouldn’t make much difference. Well I bought two bottles( probably didn’t need it), and after 15 minutes of running the car heating started to work again and water level didn’t drop. Brilliant product and well worth the money. Thanks k-seal!!
D “Wyatt” Gib
Nov 29,2020Considering all the positive experiences on here AND that without likely expensive diagnosis I can't figure where my leak is, although my suspicions are two fold, either the rear connection on the heater core or, the worst case, a rear freeze plug failure. On my mom's 2002 Lincoln Town Car with only 98,000 miles, I'm getting water dripping under the center of the car,from the bottom of the engine, just below the firewall. This car has the worst routing of the heater core in hose I've ever seen, it's routed UNDER the intake manifold from a port at the front of the engine just inside the front of the intake manifold. The out port of the heater core is routed to the heater controller (I may have the in/out reversed, but doesn't matter) on the rear of the engine. NEITHER is easily accessible as they put a junction box, not easily removed, I assume for the climate control as it has a freon pipe routed through it, even if either of these 2 hoses were the source of the leak. I can't find any evidence of water in the area of the hoses, so,unless I just can't see it, and I've used an endoscope to look, my best guess is a freeze plug on the rear of the engine or some other outer block crack. I had a vehicle years ago that developed a vertical crack between 2 freeze plugs on the rear of the engine, so maybe something like that. Wish me luck and any advice would be appreciated.
Dick Johnson
Nov 09,2020Sept. 2020: My 2005 Jeep Grand Cherokee Limited 4.7ci V8 AWD with 131,500 miles. Vehicle starting chugging accelerating over 40+ m.p.h. "Check Engine" light came on. Brought to my friend's A.S.E. repair shop. I was shocked that Scope showed Blown Head Gasket. At first, technicians didn't mention 'K-Seal' to me, but after a 20-minute discussion, they quietly recommended 'K-Seal' to me (naturally, they didn't want to lose the "change engines" business). I added 1 bottle 'K-Seal' to my radiator reservoir tank, and slowly it took about 2 weeks / 250 miles, and now no chugging, vehicle runs smoothly, 'Check Engine' light never comes on, and I'm very happy! Nov. 7th, 2020: Another friend mentioned to me that he knows a guy that used 'K-Seal' more than 2 years ago, and it's still working a miracle in his car! Thank You, K-Seal!!
Mark Weeks
Nov 08,2020We had a small seeping coolant leak from the bottom of a plastic pipe junction on our 2009 2.0 petrol Ford Focus. It looked like a failed rubber gasket or warp in the plastic cover. The gasket was about £18 pounds from ford and awkward to access due to pipes in the way. It was certainly worth trying a bottle of k-seal with nothing to lose. At first it didnt seem to have worked but after a week the leak has certainly stopped. Definitely worth trying.
Kevin Davin
Nov 07,2020Many reviews of K-Seal Pour and Go claim instant success in stopping coolant leaks in users' various vehicle applications. This review is to confirm that the K-Seal instantly stopped the head gasket leak on my '87 BMW e28 with the M30 "Big Six" with over 200k miles at the time of the repair. Over one year later and 5000 additional miles, I am pleased to report continued success with the Pour and Go repair! Talk about a silver bullet! This stuff is as easy to use and as reliable as a hammer. Use with complete confidence. Can I give 6 stars? Thanks again for a superior product. (Very affordable, too!)
Mark E.
Nov 01,2020K Seal HD is the best product available for the issues I was having. Living in the rust belt where they use a lot of salt on the roads, I drive a beater truck during the winter to keep the salt off of my newer vehicles. When I prepped the beater for winter it was blowing a lot of gray smoke and leaking water out of the exhaust pipe. With one application of K Seal HD the problem was solved. Now this 1998 Ford Ranger with 130K on the odometer runs like new, no smoke, no leaks. Should you experience the same problems that I did, buy K Seal HD, you won't be disappointed!
Jan Junge
Oct 17,202010 jaar oude citroen c4, 1.6 Vti, 130.000 km, verbruikt plots 1 liter koelvloeistof op 100 km! Geen geur van lekkende koelvloeistof, geen zichtbare lekkage. Dus waarschijnlijk de koppakking. K seal geprobeerd en tot mijn grote verbazing is het probleem gelijk opgelost. Niet te geloven. 800 euro bespaard! Wordt niet voor niets ook door de ANWB gebruikt!
Ryan Hadnett
Oct 09,2020Hi, I would love to give more stars but unfortunately it has not worked on my car. My 06 Golf GT TDi has developed a head gasket issue. I'm losing coolant fairly quickly but there are no leaks (system has been pressure tested). In the last 2 weeks I have put 2 bottles of K-seal Pour and Go (236ml) into my coolant bottle but still I continue to lose water! I'm keen to fix this problem but don't want to continue purchasing K-Seal if it's not going to solve it. Am I missing a trick here as I am reading of so many others who have great success with K-seal?
DAVID LOWE
Sep 30,2020THIS COMPANY AND ESPECIALLY COLIN ARE BRILLIANT THEY GET BACK TO YOU OVER YOUR PROBLEMS AND COLIN REALLY IS A GREAT MAN WHO HELPS IN ANY WAY HE CAN HE HAS GREAT KNOWLEDGE ON HOW TO USE K-SEAL AND ALL SUBJECTS ABOUT COOLANT PROBLEMS AND I THANK HIM VERY MUCH FOR HIS HELP AND ANOTHER BOTTLE OF K-SEAL BECAUSE I LOST SOME OUT OF THE EXPANSION TANK WHICH WAS MY OWN FAULT THANK YOU SO MUCH COLIN FROM PAUL PRESTON COLIN HELPED ME IN REGARD MY GRANDSONS VAUXHALL CORSA 1.2 SXI HOPEFULLY IF THERE IS A HEAD GASKET PROBLEM THE SECOND BOTTLE WILL SORT IT OUT THANKS SO MUCH COLIN FOR SENDING ME THIS FREE AND I HOPE TO GET IT SOON FROM YOU ALL MY VERY BEST COLIN FROM PAUL PRESTON STOKE-ON-TRENT
JohnB
Sep 28,2020I have a Ford Focus ecoboost 999c, which I understand is prone to overheating and hairline cracks in the engine block. This happened to mine , My engine overheated and lost a large amount of coolant, and I had to top it up and was using 1-2 litres per week. Online investigation revealed the fault with the model and the large cost of repair even if possible. As a last resort I tried Kseal .... it worked immediately and sealed the problem. That was two years ago . Unfortunately a few weeks ago the leak returned. On contact with the company under their guarantee, a new bottle was sent out within 3days! . On using, the leak has been repaired again, if it lasts a further 2 years saving me £££’S I will be pleased. Excellent product !!
Leon Watson
Sep 26,2020I have an 04 marquis with intake manifold leak did research watched a Visio stop at parts booth a bottle put it in there drove 13 miles home no leak 3 days later. No leaks saved 4oo.bucks great product an most important USA Made. Thanks. Leon
Mo Qureshi
Sep 25,2020Brilliant product. Does exactly what it says. Had a nasty coolant leak, couldn’t drive more then 5 mins without the warning light coming on. Once I put the k-seal, had to top up a couple of times to get the product to work. Since then no warning lights. Amazing. Saved good £300-400. Awesome stuff.
Scott
Sep 16,2020My one star is based on my experience with my car what I thought was a head gasket problem looks like an issue with a leaky turbo instead. So make sure you know what your issue is before you order this.
I Ferguson
Sep 13,2020Following a catastrophic coolant leak, used kseal Pour & go to try and seal the porous leaking block. Had an undrivable car to now having my car back on the road without any anxiety. After weeks of checking the coolant levels we havent lost a milliliter. Oustanding performance and highly recommend this product. Please note we found you had to run the car to get the temperature up and then its been perfect since. Sincere thanks.
Simon B
Sep 08,2020Peugeot 308 1.6 HDI 2010. Blown head gasket, high pressure in expansion tank pushing coolant out of it, loads of foam after pouring K-Seal into it so I left expansion tank open as advised in instruction. Left car idling for 20-25 minutes after application. Then came back home, took it for another ride after a few hours. Lost added coolant again. Another ride next day and another next next day. Still loosing loads of coolant, car is overheating, temperature gauge going crazy if I drive a bit faster than standard city driving. I ordered one more bottle to double check and will add it through hose this time to make sure if there is no chance of making repair for sure. I will come back here and change rating if it helps but there is not much chance probably... I'm giving 2/5 stars, 1 star added because they quickly came back to me with instruction how to use so support seems to be nice. Unfortunately I can't recommend as for now. :( I'm not publishing this review to revenge on company because I see that this product indeed works (based on other opinions) but to show that not all cases can be solved with some chemical solution to treat blown head gasket. Product used: standard K-Seal bottle [edit after company responded] I drop you an email. Please get in touch with me, thank you. [edit] Colin got in touch with me and after explaining everything, he sent me FREE of any charge K-Seal Ultimate as a last chance of fixing my problem. However, he told me that according to provided information, my leak is too serious and it's quite unlikely that Ultimate will help. Indeed, it didn't but I must say that K-Seal UK has a brilliant customer service and Colin is right person in the right place! Absolutely fantastic PR. Thanks for all the effort. Even though in the end product didn't help my car, I decided to change my review to 3/5 for all the reasons above.
Sam
Sep 07,2020- didn’t work in the end. Scrapped car following month Having experienced a misfire in cylinder 3 Everyday for a week in my 2008 Ford Fiesta - I took it to the garage to have plugs replaced to be told my head gasket had blown due to exhaust gases and bubbling in my coolant tank. I did my research and have previously used kseal for a previous coolant leak which it fixed. It is now day 5 after adding it, no misfire! Car drives well. I am under the impression it’s not a forever fix, but since the cars only used for a 10 mile round trip, it’s just going to be driven smoothly till it meets its fate. Overall, I recommend just throwing a bottle in! Nothing to lose...
Dan Francis
Sep 03,2020I too had a coolant leaking problem (big time) ... I got a dealer shop repair-replacement estimate. It came to $906.00. Then I started web search for the issue to be solved and came across K-Seal and reviews, etc. Now I am not one for totally trusting reviews for products and sometimes the obvious marketing scams, etc. But, for $15.00, well I bought the little blue bottle. All I can say is Wow - it works as advertised, and I mean totally. I put cardboard under the car after adding the treatment, drove about 5 miles to get engine heat up and got back home and waited... checked underneath... bingo NO LEAKS, NONE, NADA, NIL, ZERO, GOOSE EGG. Truly amazing product. I am in Upstate NY with a lot of snow and rust that follows under vehicles. That caused my pipes to leak. K-Seal stopped it 100%. I can't say enough except thanks for developing this truly super product. Dan Francis (Watertown, NY)
Cosmin Simion
Sep 01,2020Hi, i used a bottle of K Seal i think almost a year ago after noticed some mayo oil in my engine and it did the job excellent but now after probably about 7.000miles i notice my coolant is going down, slow but it does, my question is if i use a 2nd bottle maybe there is new leak/damage is it gonna do any harm to my coolant system?
graham
Aug 28,2020hello colin . iam just about to purchase ur product but ? ive got a brain teaser for you. proper mystery. here goes. you'll love this. i;ll start by saying my waterpump and timing belt were due ( bought the car from new ). the local mechanic changed it ( gates waterpump and timing belt kit ). he phoned me up and said does your car make a ticking noise(after hed fitted new parts) i said does it eck. turned out the tensioner pulley had cracked. gates sent a new 1 and i picked car up and everything seemed ok. this is were my problems start lol. since getting car back my expansion tank stays on max mark, used to rise say 1cm when operating temp reached.my oil temp gauge has gone up 8 degrees, my dpf kicks in after 90 miles( always used to be 200 )my water temp seems normal, dosent overheat. my car dosent smoke, ive put a dye in coolant ,looks like iam getting coolant going into oil and no oil going into coolant.ive bought a blue liquid test that u put on top of expansion tank , thats turned green(gasses in coolant ). this is my guessing . i think hes took the cap off expansion tank to quick,almost burned himself thus either destroying my head gasket or cracking my head or block with that tensioner pulley cracking .thats the mystery colin. i will be putting your product in and cant wait for it to arrive but in your honest knowledge ?. after everything ive descibed ? what would you say has gone wrong. p.s even though people are saying your head or block cant get damaged ? i always remember years ago i had a ford escort and accidently(inexpeirienced ) took the cap off and almost burned myself . you should have heard the cracking cooling down noises that engine made. i thought i had damaged the head or block, still to this day i dont know wether i did or not. many thanks for reading my letter colin and i bet your also mind boggled yourself lol. c u soon ta
Kwame
Dec 07,2020Permanently seals leaks in the head, head gasket, block, radiator, heater matrix and water pump. ================================== Before I start my review, above is what K-seal promises on their webiste about their K-seal pour and go. Also on the bottle, it indicates clearly that it stops permanently water pump leakage. I had a minor water pump leakage on my car and came across K-seal product. The reviews were very promising so without delay went and bought a bottle. For a moment it appeared that the leakage had stopped and I was very excited. The next day, the leakage started again, so thought because is a big car, I may need another bottle to permanently get the job done. Bought a second bottle, but no change at all. As per what K-seal claims the product does, I think that is all misleading people to waste money, this little bottle is not cheap to buy. The product does not work as they claim. Please get your car to mechanic and fix it rather than wasting money on this product, because in the end, it will not work and you still have to take it to the mechanic. When I contacted K seal, they advised that, I should have contacted them for a free bottle. My question is, what will another bottle do if the first one did not work? I spent money on two bottles and it did not work. The product is not fit for purpose...end of story.