Copper Door Weather Seal . Cooper standard weather stripping, trim, & seals products. Manufactured by zero international and pemko and can be purchased at. Self Adhesive Copper Door Pu Coated Weather Seal Strip Buy Copper from www.alibaba.com A good way to position the seal: Copper weatherstripping is the traditional type of weatherstripping used in wood jambs with wood doors. Weatherstripping is the material used to create the seal in the space (or margin) between the door and the jamb, and also between the bottom of the door and the threshold.