Waterproof RG-6 connection?

[freeway]

Can I use dielectric (sp?) grease (stuff you use on spark plug wires) where my RG-6 coax connects to my direcpc satellite dish? I?m thinking that it might improve my signal and prevent corrosion, but before I gum up the jacks with it, I want to make sure it will not hurt the signal strength. I figure if I use the grease inside the F connector, and coat the outside with silicone caulk, it will be pretty well waterproofed. Does this sound like it will work? TIA