Cover seal is mainly used in Class A security doors, aluminum alloy doors and windows, home steel doors and windows, high-end residential doors and other architectural decorative doors and windows. Cover seals are mainly used for sealing, sound insulation, dust prevention, pest control and so on. The traditional door and window seals are generally divided into PVC seals, elastomer seals, EPDM seals, silicone seals and so on. Different from traditional door and window seals, the main component is PU, which has good plasticity. The TPU fishbone barb design with perfect combination of PP frame and plastic and rubber, and the classification and application of double-sided tape imported from Germany further improve the cover seal.