The present invention provides a device which permits the passage of an electrical cords or wires through an open window or door into a building while providing a weather proof seal for the opening and preventing the entry of carbon monoxide and other fumes into the building. The device also prevents the entry of insects and/or small animals into the building thereby preventing the introduction of diseases and other health issues. The device prevents damage to the electrical cords or wires by not permitting the window or door to close directly onto the cords. The device allows the electrical cord length to be adjusted. A provision is made in the device to allow the passage of the electrical cord therethrough while maintaining the integrity of the sealed opening. The device may be formed from a number of different materials, closed cell foam being a preferred material. The device is preferably an elongate member with a provision for electrical cords to pass transversely therethrough. The opening for the electrical cord can be adjusted to accommodate different size cords. The device can be manufactured in a standard size and cut to fit a specific opening in a window or door.