New PageWeatherproofing the Feedpoint — Step by Step

1. Clean the connections first. Use a small wire brush or fine sandpaper on the copper wire and hardware to get any oxidation off before you seal anything in.
2. Apply a thin coat of dielectric grease (like the kind used on spark plugs — cheap at any auto parts store) over the bare metal connections and screw hardware. This displaces moisture and slows future oxidation.
3. Wrap the connection with regular electrical tape first — just one snug layer to give the self-amalgamating tape something to grip and to hold everything mechanically in place.
4. Wrap over that with self-amalgamating (self-fusing) tape. Start a couple inches below the connection on the coax, wrap up and over the whole connection, and come back down a couple inches past it on the other side. Stretch it as you wrap — that's what makes it fuse to itself and seal out water. No adhesive needed, it bonds to itself.
5. Optional but good — one final layer of regular electrical tape over the self-amalgamating tape. Self-amalgamating tape can get sticky and collect dirt over time in UV exposure. The outer electrical tape layer protects it.
6. Check the coax entry point into the house wherever it comes through the wall or window. That hole needs to be sealed too — a weatherproof grommet or even just silicone caulk around the cable where it enters. Water loves to wick down a coax cable and into your wall.