Polytetrafluoroethylene tape is a chemical substance made of pure polytetrafluoroethylene dispersion resin, laminated and stretched at high temperature. The PTFE tape is made of pure PTFE dispersion resin, which is formed by lamination and high temperature stretching. It has low friction coefficient, chemical corrosion resistance and good sealing performance. It is suitable for the sealing of reaction kettles, steam generators and various special-shaped mouth tanks and barrels. This PTFE sealing tape retains the excellent chemical corrosion resistance of PTFE, and at the same time has excellent flexibility, compression strength, excellent creep resistance, cold flow characteristics, and high tensile strength strength.