Allied Moulded's vapor seal boxes are designed to meet state and local energy savings requirements. When used in conjunction with the building interior wrap material, the flexible polyurethane flange around the box forms an energy efficient vapor seal that provides an air barrier in exterior walls and ceilings.

The benefits of using these boxes in areas of the country without energy requirments can also be realized by preventing air leaks in exterior walls. Allied Moulded vapor seal boxes can help stop warm air leaks during the winter and, conversely, cool air leaks during the heat of summer making for a more energy efficient home.