Sometimes low tech is just what you need. These white vinyl magnetic
register covers allow you to easily seal steel heating/cooling registers that no longer close properly. Simply place these magnetic sheets over the face of steel registers to seal them. Sold in sets of three, they can be painted to match the decor in your room. Each cover is 8" high x 15.5" wide, and can be cut with scissors to fit. Because magnetic are not attracted to aluminum, it is prudent to check your registers before ordering.