Engine Seal Ltd. Company No :8430211Confirmed UK ,Examination Of Trade Mark Standard.SpecificationsPermanently Seals:Cracked Cylinder Heads,Blown Head Gaskets, All Block Leaks.Engine Seal.MCPPermanently Seals: Works On:Cracked Cylinder Heads Gasoline and Diesel EnginesBlown Head Gaskets Cast Iron or Aluminum Blocks & HeadsIntake Gasket Leaks MLS - Multi Layer Steel Gasket All Block Leaks Copper Head GasketsOther Severe Coolant Leaks Composite Head Gaskets