I use silicone, only a small dab at the corners where th cork meets the rubber.
Then gasket adhesive, (contact cement) to attach cork and rubber to oil pan.
Finally Permatex #2 spread smoothly and very thin on top of gaskets where meets block.

Once a long time ago used silicone lightly on both sides of oil pan gasket and later had a terrible time removing the pan, never going to do that again. Mostly avoid using silicone gasket maker altogether.

•1951 GMC 250 in the Project Journals
•1948 Chevrolet 6400 - Detroit Diesel 4-53T - Roadranger 10 speed overdrive - 4 wheel disc brakes
•1952 Chevrolet 3800 pickup
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"First, get a clear notion of what you desire to accomplish, and then in all probability you will succeed in doing it..." -Henry Maudslay-