Sealing strips play an important role in waterproofing, sealing and energy saving in plastic steel doors and windows, broken bridge aluminum doors and windows and wooden doors and windows. It must have strong tensile strength, good elasticity, and good temperature resistance and aging resistance. In order to ensure the tightness of the rubber strip and the profile, the cross-sectional structure of the rubber strip must match the plastic steel door and window profile. Sealing strips are generally used for opening doors and windows, hanging windows, and folding doors and windows. The main functions are dustproof, insect-proof, waterproof, soundproof, and sealing.