One thing to remember is that Corrosion X is NOT a waterproofer. It is a water displacer. Much like WD40, it gets between the water and the board or connector it is protecting but unlike WD40, it is thicker and lasts much longer. Contact pressure displaces it so it works well for connectors as well. Since it is semi-fluid in consistancy, when you unplug the RJ45, it flows back over the pins and when you plug it back in, the contacts push it back out of the way.