I replaced my Valve cover gasket and the gaskets inside the valve cover today, everything went well. I decided to do it because I had some oil leaking into the spark plug holes (the first 2 from the left side). Well I put it all back together, gasket sealed up fine, but, I ran the car a little while and I am still getting some oil in the same 2 spark plug holes. What can I do to help seal these holes? Thanks in advance!

Get some high temp silicone and put a little around the gasket(s) before you put them on.

Is that ok inside the valve cover? Will it not mix with the oil? Any suggestions on brand? Thanks