Steel Seal Head Gasket Repair – 16 fl oz – 4-Cylinder

Steel Seal is a particle-free thermochemical head gasket repair. It is poured into the cooling system and reacts under heat and pressure to form a hardened seal at the damaged area of the head gasket or block.

Unlike many sodium-silicate ("liquid glass") products, Steel Seal contains no fibrous particles or fillers, so it will not clog heaters, radiators or water pumps.
It is designed as a practical alternative when a full mechanical head gasket replacement is not viable — typically $1,000-$3,000 in labor and parts. Suitable for steel and aluminum head gaskets. No tools required.

Steel Seal has been trusted since 1999, with over 1 million bottles sold worldwide. If the repair is unsuccessful when instructions are followed, Steel Seal refunds the customer directly — the store keeps the sale.