Scotch cold temperature box sealing tape 3721 is an industrial cold temperature packaging tape engineered with a polypropylene film backing and hot melt rubber adhesive. Our design offers a strong backing and aggressive adhesive specially engineered to provide secure and durable closures in cold temperatures. - Hot melt rubber adhesive provides a secure hold in refrigerated/cold weather conditions. Conformable backing forms around edges and rough surfaces for a tight seal. Pressure sensitive hot melt rubber-resin adhesive.