Steel Seal online recommends that vehicle owners everywhere should use the block seal product to remedy cracked engine blocks and heads, and warped head and blown head gaskets. Steel Seal online advises that the block seal product genuinely works efficiently, but for the few who might find the simplicity of use too good to be true they can use the online “Find a Professional Installer” tool on the website and view over 500 professional repair shops in all fifty states of the US who offer Steel Seal installation. From the thousands of professionals who have used Steel Seal over the past eleven years, the Steel Seal online staff has chosen the best repair shops to make up the professional installer list. Steel Seal offers its lifetime guarantee on the block seal product, which is the finest guarantee in the industry.

The Steel Seal block seal product is easy-to-use with the Pour and Go 3-step system and vehicle owners will be able to be up and running in less than an hour. If motorists prefer to have it done for them, they should contact one of the recommended repair shops on the professional installer list. Steel Seal, the block seal product, permanently seals head gaskets, warped heads and cracked engine blocks and heads by creating a permanent seal that will sturdily withstand high temperatures and high pressures. The block seal product from Steel Seal can be used in both gasoline and diesel engines and it is compatible will all brands of antifreeze products. The Steel Seal block seal product should be poured into the radiator of a cold engine. Once the vehicle engine is started and reaches operating temperature, the Steel Seal block seal product is distributed throughout the engine. The block seal product is drawn into the damaged area and seals the crack with a thermo-chemical bonding process.

Other products rely on fillers to achieve repair work, but as the pressure rises and falls during ignition and shut-off, the particles lodged in the cracks will loosen and fall out. Competing repair products offer only a temporary solution. Steel Seal’s block seal solution is a unique blend of several chemicals and it is a clear formula that contains no fibrous materials or particles that could clog engine coolant passages. The block seal does not rely on floating particles to accomplish the repair work. Steel Seal relies on chemistry for its strength and dependability. Regardless of the value of a vehicle, owners now have a practical solution backed by the best guarantee in the industry. In a fraction of the time and cost of a major engine repair, drivers can take advantage of this technological breakthrough. Steel Seal recommends that drivers should carefully read the entire sheet of instructions before using the block seal solution. If the radiator or overflow tank is full enough, antifreeze should be drained off to allow the Steel Seal block seal to be poured in. Standard Lev-R-Vent radiator caps can be used during the procedure to relieve pressure.

Steel Seal


Steel Seal, with it's 99% success rate will seal your blown gasket or cracked head, or receive a full refund under our money back guarantee. It’s a green transparent liquid formula that permanently seals a crack in the head gasket.

To order Steel Seal simply choose the correct product for your vehicle from the menu below and click add to cart.

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SKU: 0113.
our guarantee

Product Description

Steel Seal – Easy Head Gasket Repair

Steel Seal is 100% guaranteed to seal your blown gasket or cracked head. It’s a clear, liquid formula that permanently seals a crack in the head gasket. This sealer will permanently fix the blown gasket or cracked head and stop leakage.

  • Backed with a 100% Money-Back Guarantee
  • Steel Seal has 3 patents from the U.S. Government
  • Used by thousands of repair shops nationwide

It will also fix cracked heads and blocks as well as leaking freeze plugs and heater cores.

How Our Guarantee Works:

Quite simply, if the Steel Seal fails to repair your blown head gasket, cracked head or block, or fails at any point during the time you own your vehicle we will send you additional product at no extra cost, and without the hassle that many people often expect from a guarantee. It’s that straightforward!

100% money back

If you feel Steel Seal has failed to repair your head gasket please contact Technical support within 30 days of purchase for a full refund.

Unconditional lifetime warranty

Original owner — Non transferable

After thirty days Steel Seal will automatically initiate an unconditional life time Warranty.

View our full Guarantee Terms here: Lifetime Guarantee

Additional Information

Weight 4.2 lbs

16 oz (4 cylinders), 32 oz (6 & 8 cylinders)