The Right Stuff these days. As a matter of fact on the 440 I recently built I put a thin bead of that on the block followed by a gasket, followed by another bead, then the windage tray and another bead then the pan. Yes, I forgot the second gasket!! And it didn't occur to me until I saw it hanging on something after I had it all buttoned up. Duh!! But guess what? No leak. I use the cork gaskets and massage the pan back into shape as mentioned above but do not over tighten! With the double gaskets you can easily squish out the area under the bolt and break the gasket. Also, trim the timing cover gasket flush with the block so it doesn't cut the pan gasket.