Quote Originally Posted by Tony G
I'm leaning toward butyl as a sealant and then run a bead of whilte 101 around the opening to hide the black.
You should be able to find white butyl. I got some at Ace Hardware for something like 2.50 a tube. I used 4 tubes, I think, on Dasein's 4 deadlights, 6 ports, and a couple of odd plastic fittings.