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🛠️ Seal the deal before your engine feels the heat!
The Award Winning Steel Seal is a revolutionary engine cooling system additive that permanently repairs side leaks in cylinder head gaskets and engine blocks. Compatible with all water-cooled engines, it uses a unique thermochemical bonding process to create a durable, clog-free seal without requiring engine disassembly. Trusted by professionals and DIYers alike, it offers a cost-effective alternative to expensive repairs while protecting your cooling system from deposits and blockages.











| ASIN | B004BU44H0 |
| Best Sellers Rank | 50,446 in Automotive ( See Top 100 in Automotive ) 349 in Fillers, Adhesives & Sealants |
| Brand | Steel Seal |
| Customer Reviews | 4.1 out of 5 stars 532 Reviews |
| Item Shape | Round |
| Manufacturer | STEELSEAL |
| Manufacturer Part Number | SSAT |
| Material | Alloy Steel |
| Model Number | 5052665000005 |
| Number of Items | 1 |
| Number of items | 1 |
| Shape | Round |
M**.
A final option, still working.
Had head gasket replaced, which cured coolant leak into oil for about 1 month only, and cost £860. Flushed system and added Steel Seal 9 weeks ago, and all is still good at present. Wish I had just done this the first time, and saved myself the £860.
P**E
Drain out your red antifreeze
Most important you will get a horrible gel if you don’t drain and flush with fresh water. Worked well for a season, stopped pressurisation. Signs now that it may be wearing off. Still, I’m prepared for an annual bottle as sooo much cheaper than a head gasket job on a banger
W**E
Works
This stuff does work, how long for I don't know time will tell. Bought for my partners car as she was losing water somewhere, I put this in following the ideal procedure water out, engine flush, and adding back into the system, allowing to circulate round the engine. She's not lost any coolant upto now and its been over a week. Was very sceptical being a 40 quid bottle over what could be an expensive repair job but upto now it seems to have done what it needs to.
K**.
Follow the instructions
100% saved the day thanks
O**E
Save your money
Wouldn’t bother. Basically turns to a wallpaper paste consistency, leak didn’t seal and the coolant pipes, thermostat were caked in a thick glue like material.
C**N
Coolant leak
It didn't work on my car for the job needed.
A**N
Highly recommend
This stuff worked for about 6-7 months when I contacted the seller (steal seal) they where more than happy to stick to there policy of lifetime guarantee and after I sent in proof of purchase and a claims form they sent out a new bottle. I will recommend this product to anyone in a sticky situation and needs a quick fix for there head gasket. My
A**S
Almost worked
I wasn't sure if this would work as I was losing about 170ml of coolant a day and had water in the oil. I used this product as directed, took it for a few miles drive, let the engine cool and topped up with water to the fill line. I checked the coolant level after a few days and it was ever so slightly below the fill line. I can still smell exhaust fumes inside the cabin when idling which suggests that exhaust gases are seeping into the heater matrix so it hasn't fixed it fully but I think it may have bought me a little time. I'm scrapping the car soon anyway I just need it to survive another few months until I can afford another car.
M**T
perfect , fixed small leak in head gasket
perfect , fixed small leak in head gasket
W**R
Did'nt work as expected
It didn't work as expected. just wondering how to apply for refund
M**E
E' come tirare una monetina...
Non ha funzionato su una Punto 188 1.2 8v del 2000: la temperatura dell'acqua sale ed entrano gas combusti nel circuito del refrigerante, perche' la guarnizione di testa e' rotta. Pur avendo drenato il vecchio refrigerante e usato solo acqua e SteelSeal e pur togliendo il termostato per far circolare subito il liquido, non ho ottenuto la sigillatura. Peccato perche' chiedono 450 euro per firare la guarnizione di testa.
J**.
Absolut genial das Zeug
Symptome am Fahrzeug: Schleichender Wasserverlust, Öldeckel schlammig. Co2 Test ergab, Abgase im Kühlwasser. Anfangs skeptisch wegen den einigen negativen Bewertungen, aber ich dachte mir bevor ich jetzt 1500€ für eine neue ZKD investiere oder im schlimmsten Fall einen Riss im Kopf habe teste ich das Mittel einfach. Habe alles nach Anleitung gemacht und bin jetzt ca 500km gefahren. Ergebnis: Co2 Test negativ, keinen Wasserverlust mehr. Wenns jetzt noch ewig hält wär es super. Ich kanns nur empfehlen.
F**S
God
God
Trustpilot
2 days ago
5 days ago