[dgax65]

After I solder the leads to the switch terminals I coat the switch casing with liquid electrical tape. The only thing that I don't cover is the toggle switch and the threads. I usually use a couple of coats and let it dry completely before installing. I put a very thin film of di-electric grease on the switch and threads then install the rubber boot. I'll usually put a thick bead of Marine Goop around the base of the switch to cover the threads. I've had switches last for over 3 years with no sign of corrosion using this method. A little extreme, but it sure does keep the electronics in good working order.