* The above figures refer to German-speaking countries (D, A and CH) since market launch in 2015.
Not suitable for all types of damage! Quickly check on the order page whether Steel Seal® matches your vehicle’s symptoms.
Steel Seal® is the tried and tested alternative to replacing a defective Head Gasket. Our cylinder head gasket sealant is universal can be used for all vehicles with water-cooled engines and is effective for Leaks on the cooling water side of the head gasketbut also for Cracks in the cylinder head or Engine block. Due to the unique thermal mode of action is sealed with Steel Seal® accurate and permanent. The formula contains no fillers and thus protects other areas of the cooling system from deposits. In recent years, Steel Seal® has become synonymous with a quick, inexpensive and permanent effective solution for defective cylinder head gaskets that has delighted thousands of customers...
Experience yourself and order Steel Seal® today!
| Repair | Reparatur in der Werkstatt | |
|---|---|---|
| Keine Demontage erforderlich | ✅ | ❌ |
| Kein Spezialwerkzeug | ✅ | ❌ |
| Geringer Zeitaufwand | ✅ | ❌ |
| Hohe Kosten sparen | ✅ | ❌ |
| Wirtschaftlich sinnvoll | ✅ | ❌ |
| Motorzerlegung erforderlich | ❌ | ✅ |
| Umfassende Motorreparatur | ❌ | ✅ |
VW Sharan, 1.9 TDI 96 kW (130PS), year of construction: 2007
Peter had noticed severe overpressure in the cooling system of his VW Sharan and was losing approx. 1 liter of coolant per 100 km.
1 bottle of Steel Seal filled into the cooling system according to the instructions for use.
Pressure in the cooling system normalized immediately after application and the loss of coolant was stopped.
After more than 4 years, Peter is still driving with the original engine of his VW Sharan and without dismantling. Steel Seal has permanently repaired the damage to his cylinder-head gasket.
BMW 3 Series E46, year of construction: 2005
During a routine check, Fritz noticed oil in the coolant tank and shortly afterwards compression pressure in the cooling system of his BMW E46.
After previously flushing the cooling system with clear water, fill 1 bottle of Steel Seal and distilled water into the cooling system according to the instructions.
Both the compression pressure and the oil disappeared from the cooling system immediately after use.
The cooling system has been clean for a year and a half or 18 months and the BMW E46 runs without any new symptoms and without dismantling or removing any engine parts.
The mechanical replacement of the cylinder head gasket in older vehicles with a certain mileage also involves certain risks that often go unmentioned. For example, hairline cracks in the cylinder head often remain undetected or warped cylinder heads have to be ground flat ...
SEAT Ibiza, 1.2 Petrol 51kW (69PS), year of construction 2011
Richie had noticed a loss of cooling water in spring 2023. However, after replacing the water pump and thermostat, the loss of water persisted. A CO2 coolant test then turned out positive, i.e. exhaust gases (CO2) were detected in the cooling system.
1 bottle of Steel Seal filled into the cooling system according to the instructions for use.
Positive. A new CO2 coolant test remained negative. This means that no more exhaust gases were detected in the cooling system. The loss of coolant was also stopped.
After 8 months and approx. 25,000 kilometers driven, there is still no cooling water loss.
| Kriterium | Klassisches Kühlerdichtmittel | Steel Seal® |
|---|---|---|
| Entwickelt für | Allgemeine Undichtigkeiten im Kühlsystem | ✅ Undichte Zylinderkopfdichtungen und kühlwasserseitige Leckagen |
| Anwendungsbereich | Universell für verschiedene Leckagen im Kühlsystem | ✅ Speziell für den Anwendungsfall „defekte Zylinderkopfdichtung“ entwickelt |
| Wirkungsweise | Basiert häufig auf klassischen Füllstoffen (z. B. Fasern oder Granulaten) | ✅ Thermische Wirkungsweise - faserfrei (keine klassischen Füllstoffe) |
| Technischer Support | In der Regel keine individuelle technische Produktberatung | ✅ Kostenlose technische Produktberatung - vor und nach dem Kauf |
| Money-back guarantee | Keine | ✅ 30 Tage Geld-zurück-Garantie* |
Viele Produkte werden als Kühlerdichtmittel angeboten. Sie verfolgen jedoch unterschiedliche Einsatzzwecke. Steel Seal wurde speziell für kühlwasserseitige Leckagen an der Zylinderkopfdichtung entwickelt und unterscheidet sich deshalb in mehreren Punkten von klassischen Kühlerdichtmitteln.
Replacing a defective cylinder-head gasket at a specialist workshop costs money and, depending on the type of vehicle, can amount to several hundred to thousands of euros, which you can save with Steel Seal®.
Bei richtiger Anwendung verspricht Steel Seal® eine dauerhafte Reparatur der Zylinderkopfdichtung mit einer Erfolgsquote von derzeit 98.73% (Reklamationen/verkaufte Produkte, Stand Aug. 2026).
Steel Seal® reduces the time required to repair the engine to a minimum and gets your vehicle back on the road quickly and safely.
Steel Seal® ist erprobt, bewährt und begeistert seit mittlerweile 25 Jahren zahlreiche Kunden mit seinem Anwendungsergebnis.
Thanks to its simple handling, Steel Seal® is easy and uncomplicated to use, even without specialist knowledge or tools.
Renowned automotive specialty stores have awarded Steel Seal® with "Best Product" awards and Steel Seal® will continue to win many more prizes and awards in the future.
Fill the recommended amount of Steel Seal® into the cooling system of your engine via the radiator or expansion tank.
Switch on the heater & fan and let the engine warm up to operating temperature and then for another 30 minutes.
Switch off the engine, allow it to cool down completely and continue driving your vehicle as usual.
Detailed step-by-step instructions on how best to use Steel Seal are included with your online order.
Beantworte kurz die folgenden Fragen. Treffen die meisten Punkte auf dein Fahrzeug zu, ist Steel Seal wahrscheinlich die passende Lösung.
Nicht sicher? Unser technischer Support hilft dir kostenlos bei der Einschätzung deines Schadensbildes.
Product advice: Mon–Fri 8:00 am–4:00 pm | Phone support: +49-9101-9018160 - +43-1-9962116 | Email: info@steelseal.de
Overview
This could also help you:
Hand pump with hose for easy extraction of cooling water from the radiator.
The radiator cleaner effectively cleans all hoses and components of the cooling system.
Simple & effective diagnosis of leaks in the cylinder head gasket or cylinder head.
Discounts can only be redeemed at checkout.
| Subtotal | 0,00 € |
| Shipping costs in DE & AT | Kostenlos! |
| Total amount incl. VAT | 0,00 € EUR |
