Corrosion protection on outdoor terminals

in these parts, when there is corrosion on the compressor terminals, its from moisture condensing on the compressor because its GROSSLY OVERCHARGED. Some that I have seen have even had algae and moss on the side of the compressor. I would be willing to bet that the customer has to turn the stat way down to feel "cool", the indoor RH is real high, and their power bills are real high too. Clean/dry the compressor terminals, put new connectors on the wires, and make sure that that they are tight when you put it back together. Recover the excess refrigerant(probably gonna be several pounds), and properly balance the refrigerant charge using subcooling and superheat.

You mock the boy ?

Same that you would use on your Vehicle Battery terminal

Silicon sealant is conductive at higher voltage before it gets cure do not use it, unless you can afford to wait until is 100% completely dry/cure. And then you have problem if you need to remove terminal for any reason.

Hi Chris Be aware that Silicon in large quantity while is curing/drying generate gases that will ignite and possible cause explosion I know they don't tell you this any place but it has happen.