Can this £30 bottle of Steel Seal save my cheap V8 Jaguar?

After more troubleshooting and trips to the garage with my troublesome Jaguar S Type, there's reason to believe that my car might be suffering from a failed

Synthetic Oil Causes Gaskets to Soften, Leading to Oil Leak

Can My Cheap V8 Jaguar S-Type Be Saved From The Scrapyard?

Can this £30 bottle of Steel Seal save my cheap V8 Jaguar?

Synthetic Oil Causes Gaskets to Soften, Leading to Oil Leak

Can this £30 bottle of Steel Seal save my cheap V8 Jaguar?

2*Aluminum Engine Valve Cover for 2002-2008 Jaguar S-Type 3.0L

Jaguar X Type Steel Seal Head Gasket Repair

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Steel Seal Blown Head Gasket Fix Repair Sealer - 8

☼2000-2003 JAGUAR S-TYPE 3.0L ENGINE COOLANT RESERVIOR RECOVERY

Can this £30 bottle of Steel Seal save my cheap V8 Jaguar?

Head Gasket Sealer for 8 Cylinder Engines - Steel Seal