1. Clean the surface of doors and windows: Use detergent and towels to thoroughly clean the surfaces of doors and windows to ensure that they are clean and dry.
2. Measure the size: Use tools such as a tape measure to measure the size of the doors and windows to ensure that the length, width and other dimensions of the thermoplastic sealing strip match the joints of the doors and windows.
3. Cut the sealing strip: Use scissors or a cutting machine to cut the thermoplastic sealing strip into a suitable length and width according to the measured size.

4. Hot melt: Put the thermoplastic sealing strip into the hot melt machine and heat it to an appropriate temperature to make the sealing strip soft and easy to squeeze.

5. Filling: Squeeze the hot-melted sealant strip into the joints of doors and windows to ensure that the sealant strips are fully filled into the joints to achieve sealing, sound insulation, heat preservation and other effects.
6. Finishing: Use a knife and other tools to clean up the edge of the sealing strip to make it smooth and beautiful with the surface of the door and window.
7. Curing: Wait for the sealant strip to cure naturally or use a curing agent to accelerate curing. The curing time varies according to the material and thickness of the sealant strip, and generally needs to wait for 12-24 hours.
The above is the usage method of thermoplastic sealing strips. When using, the appropriate thermoplastic sealing strips should be selected according to the specific size and material of doors and windows, and operated according to the usage methods.