Bar's H1S1L-27 Head Gasket Repair 600ml

Used for a slight head gasket fail where a small amount of coolant would seep into one cylinder when engine shut down from hot (making hard to start from cold next day - petrol engine). Worked perfectly and sealed the fault completely. 100's of miles covered since using this sealant and no issues at all. Coolant still flowing great, perfectly clear & no evidence of clumping etc. I started and run engine to temp for 15 mins, shut down, cool, release pressure and repeat over a few hours. Very impressed - would recommend!

OK I'm tempting fate here and I'm crossing my fingers and toes, but this seems to have cured what I'm pretty sure was the start of a leaky head gasket. Given that it's an old car, this would have been the kiss of death, as the cost of replacing the gasket would have been prohibitive. I had a misfire on startup that cleared after a couple of minutes, and the engine management light came on and stayed on. I was also losing some coolant, though there was no discolouration of the engine oil. After using this - following the instructions to the letter - the misfire went away and my garage was able to clear the warning light. I'll keep crossing my fingers but after a couple of months, I have to say this is highly recommended. How well it works will obviously depend on where exactly your head gasket is leaking and how badly, so it won't work for everyone, but it's certainly worth a try.

Didn’t work, steel seal did!

Work like magic. Worth money. My ford fiesta 2009 model had serious gasket issue and if I replace with new so it cost more than £1000 but this product work very well and resolve issue. But I suggest to read instructions very carefully and also get idea that how to use this type of product by watching videos from YouTube. My issue resolved in just 1 hour. Work very well and leakage absolutely stop. No smoke or no harmful for engine or anything. Cooling capacity is good.

I'm not quite sure my car needed this, but maybe it did .Read instructions and I only needed half bottle, syphoned off that amount from cooling system and poured in, ran car engine plus heating/air conditioning 15 minutes, done. I figured if my car did not need it, it still was a good precaution

Do these chemicals work, Dont buy them .

I must have had a pinhole sized leak in my radiator...i couldn't locate it physically. I decided to use this and it worked a treat. 6 months later and still no leak.

So, I have a tale of woe...... Unfortunately I had some work done on my car by someone not up to the standards I would expect. He left me with a water leak that was using 0.5 ltr of water every day. I started using a different garage, but they could not quickly find a leak (pressure test did not highlight a point of leakage, and the chemical tests ruled out a head gasket failure. So my choice was to try this, or spend a lot of money on finding the leak. After researching which sealant to use, I finally picked this one. Something I was worried about was clogging the air-conditioning system. But since I used this, I have not had to top up my radiator at all (several months have now passed) No dashboard error warning and the Aircon still blows warm air when needed. (Just for the record, my car is a 2013 C220 CDI) I am really happy with this, and it really did save a fortune, just in diagnostic charges.

Voilà bien 15.000 km que j'ai versé ce produit dans le vase d'expansion de ma voiture (bmw e91 320d 2007) qui n'était plus du tout conduisible, fumée blanche hyper épaisse en roulant....la faute à un simple refroidisseur EGR que je viens de remplacer. En attendant la réparation, ce produit a été d'un grand secours

Produit efficace sur une fiat 500, 2011 1.2L 69cv, au début chauffage fonctionnait en intermittence (température d'ambiance 16°C et je suis obligé de mettre jusqu'à 28 °C le chauffage pour sentir la chaleur) puis pression détectée dans le vase d'expansion, fumée blanche (dont je suis pas sur car disparait quand le moteur est chaud) Je me doutais si c'était le début de joint culasse H.S. Le premier matin après avoir mis le produit en suivant les instructions, rien ne s'est passé dans la journée, les problème de chauffage continue. A partir de deuxième jour, quand je mettais le chauffage à 25°C je sentais que c'était plus chaud que la veille ! Je continuerai à mettre à jour de ce que je vois dans les prochains jours .. Mais à mon avis c'est un peu comme loto, parce que j'ai déjà essayer de réparer une mini 1,6L 2005 diesel avant mais avec grosse pression dans la vase d'expansion au moteur chaud et le réparateur n'a pas pu faire son travail -> car il n'a pas pu circuler jusqu'à endroit ou il y a la pression et la réaction n'a pas pu se produite... Je pense que ce produit peut être efficace si on l'utilise au début des symtômes de joint de culasse H.S. surtout assurez-vous que le produit rentre dans le circuit et près de joint culasse.

I think it's work it lost the problem

Kurze Bewertung: Modell: M111 Motor im W210 E200 1996 Schaden: Wasser im Brennraum, schlechter Motorlauf, starker weißer Qualm, Motor lief im Stand heiß 🔥bis 110 Grad. Vorgehensweise: Altes Kühlwasser abgelassen. Neues Wasser rein mit wenig Anteil Frostschutz und ca. knapp 1 Liter weniger als Maximal und dann das Zeug dazugeben. Und bin dann mit Maximal 2.000 Touren 30 Minuten gefahren und hab den Wagen bis Mittag am nächsten Tag stehen gelassen. Ergebnis: Der Wagen läuft wieder richtig gut 👍. Kein Qualm, springt gut an, kein Heiß werden. Ein CO2 Test muss ich noch machen vorher war dieser gelb. Mal abwarten was passiert. Ich denke mir hat es geholfen und es kostet nur ein viertel im Vergleich zu Steel Seal. Update: CO2 TEST SUPER!! ALLES IN ORDNUNG BLAU GEBLIEBEN

Ne fonctionne pas comme le reste des additifs trompeurs