How about just using good gaskets and installing them properly? I try my best to use a minimum of silicone. Excess squeeze out on the outside looks sloppy and I don't like to imagine the possible issues with squeeze out on the inside getting loose.
This installation has got eleven years and over ten thousand miles on it and hasn't leaked a drop.
I do re-torque/check my engine fasteners each season. Rocker cover bolts, oil pan and carb bowl screws always seem to take up a little, manifold hardware not so much after the first few times. Head bolts and internals I do not touch.