You can put that **** on anything. Its not conductive, easily displaces for metal to metal contact and makes removing plugs much easier. We used that stuff all day on CATV fittings and could pack the F-connector with it and still get a working connection, ie no degrading of the connectivity. Any time you have a bi-metal connection (brass to AL, brass to gold, AL to steel, etc) your gonna get some corrosion. non reactive gold to gold is the best but that's usually higher end stuff. Anytime you have a weatherproof fitting (ie O-ringed sensor plugs on a modern motor) put a light coat around the sealing ring, makes taking that fitting off possible without breaking it in the distance future.