engine case half sealing?

I’ve always used a product from Porsche that they use to seal engine cases. I’ve been a Porsche tech for ever and I‘ve owned a Porsche shop for many years now so I always have some.
 
What Pete said. I use Dow Corning Silicone Vacuum Grease or GM silicone EPDM. Chemically inert, etc.
When you rebuild they just wipe off. Easy Peasy

John
 
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