1. First clean the surface to be pasted to make it clean, smooth, flat and dry.

2. Measure the height of the door and window. According to this height, use scissors to cut off the sealing strip of appropriate length.

3. Peel off a small piece of back protection paper, install the sealing strip to the correct position and compact it.

4. Continuously peel off the back and protect the isolation paper, so that the sealing strip extends down the frame and is constantly compacted, taking care not to stretch.