The sealing strips for security doors on the market are typically made from PVC, modified PVC, EPDM, elastomeric seals (including TPV, TPE, TPR, and SEBS), silicone rubber, and other materials. Modified PVC sealing strips for security doors are relatively low in price. EPDM rubber sealing strips for security doors boast excellent overall performance, including outstanding resistance to ozone, weathering, high temperatures, low temperatures, chemicals, a wide range of solvents, and a relatively low density. Thermoplastic EPDM/PP sealing strips for security doors can be produced through plastic processing due to the flexibility and elasticity of the rubber, eliminating the need for curing; moreover, any waste generated during production can be recycled and reused. This material offers a broad spectrum of properties, featuring good heat and cold resistance, a relatively low density, oil resistance, solvent resistance, and compatibility with fluoroelastomers, as well as long-term compression resistance and wear resistance.

The rubber seals for security doors exhibit excellent resistance to corrosion, abrasion, acids and alkalis, as well as various chemical media; they also possess fire resistance and high mechanical strength. However, their drawbacks include the easy migration of plasticizers within the system, which over time cause the seals to harden, become brittle, lose elasticity, and deteriorate in aging resistance. Additionally, they suffer from poor weather resistance and subpar performance at low temperatures. Generally, darker-colored products are suitable for environments with subdued lighting, relatively stable temperature fluctuations, and favorable weather conditions. In particular, seals coated with silicone topcoats have a low coefficient of friction on their surface, which facilitates smooth sliding of doors and windows.