Permanently Seals:Cracked Cylinder Heads,Blown Head Gaskets, All Block Leaks. Permanently Seals: Works On: Cracked Cylinder Heads Gasoline and Diesel Engines Blown Head Gaskets Cast Iron or Aluminum Blocks & Heads Intake Gasket Leaks MLS - Multi Layer Steel Gasket All Block Leaks Copper Head Gaskets Other Severe Coolant Leaks Composite Head Gaskets.
