Abstract: This invention teaches an improved cover designed to be positioned in place over an electric outlet box otherwise exposed on the outside of an exterior wall operable to weatherize the wall and minimize leakage past the outlet box. The cover has a tubular wall, and a flange and closure wall are integral with the tubular wall and disposed at its opposite ends respectively transversely thereto. The cover is formed of plastic and is unitary, with the tubular wall being continuous circumferentially, with the flange extending radially outward from the tubular wall and being continuous peripherally, and with the closure wall having an opening therein which corresponds in size to the access opening on the outlet box. The cover flange is positioned flush against the exterior wall with the closure wall opening lined up adjacent the outlet box, and the flange is secured by nails or the like to the exterior wall in this position.