I know that there has been some issues with sealing up cat 5 connections. Back in the day when I was racing rc cars and we had mechanical speed controllers, we would seal them in a balloon to keep out dust and moisture. That is what I did with my cat5 connections. Poked a hole in on side of the balloon and slid it over the connection then zip tied both ends. Seems to be working well. I will try to take some pictures this evening if I can
