Steel Seal® is the simple and cost-effective smart repair solution for defective cylinder-head gaskets. Proven and award-winning alternative to the time-consuming and costly replacement of the cylinder-head gasket since 1999.

Where can I find my cubic capacity?

NoteIf other additives or sealants (with the exception of commercially available radiator antifreeze) have been used, we strongly recommend that the Rinsing the cooling system with clear water before use. If the cooling system is obviously contaminated (oil, limescale, radiator sludge, etc.), we recommend using the Concentrated cooler rinse from PowerMaxed® (here in the store) for cleaning and Optimum preparation of the cooling system for use with Steel Seal®.

After using the cleaner, rinse the system again with clear water and use the following for the application with Steel Seal® either only pure water or coolant with a Water content of more than 75%, i.e. a mixing ratio of at least 3:1 with antifreeze. Use No radiator antifreeze labeled as "Longlife" or "Long-term", but only conventional antifreeze (e.g. 2- or 3-year blue radiator antifreeze). After application, any commercially available coolant can be used in the cooling system again.

Money-back guarantee
If you’re not 100% satisfied with the result, we offer a full money-back guarantee. You can find the guarantee terms in our T&Cs (Section 10) or under Money-back guarantee .