The main functions are dustproof, insect-proof, waterproof, soundproof, and sealed. Plastic steel door and window sealing strips on the market are generally made of PVC, modified PVC, EPDM, elastomeric sealing strips (including TPV, TPE, TPR, SEBS), silicone and other materials to form a good waterproof and sealing effect. And also has sound insulation, anti-freezing, warmth and other functions. Plastic steel door and window sealing strips have good elasticity, strong telescopic ability, high temperature resistance, and long service life.

It must have strong tensile strength, good elasticity, and also need good temperature resistance and aging resistance.