A mechanic mate of mine told me about this grease and recommended I should put it in the connections for me fish finder. He said it was conductive and would protect it from salt water etc. They use it for connections in the cars he works on. Anyway I decided to give it a go on my sounder since it was starting to corrode and had an inconsistent connection. It has worked well for me and I'm not having to unplug and re plug to try get a connection. I found that repco sell it in little sachets for 70cents which I found to be more than enough.
Does anyone else use this stuff and been keeping it a secret? I had been spraying around the connections with inox previously.