silacone works unless you own a dodge with a vent on top of the distribuer cap like Mine has. If you block off the vent it will get moisture in it and not run. I have seen people use the bottom of gatoraid bottle before if there is room. I was gonna do that but my plug wires wont allow me to. I still dont have it water proofed.
w d 40 lots of it.it stands for water displacemant