1. The sealing of doors and windows is low. Poor quality sealant strips contain inferior plasticizers or substitutes, which tend to age and harden and shrink in winter. There is a gap between the glass and the profile, causing water leakage and dust. Many users often find that red liquid flows out of the bead part of the plastic window in the rainy season, which is caused by the corrosion of the steel lining after the water enters between the window glass and the sealing strip. Not only greatly reduces the appearance of doors and windows, but also greatly affects the life of doors and windows.

2. Oil leakage on the surface of the rubber strip. Waste engine oil and PVC are not compatible with sealant strips at all. It is easy for grease to appear on the surface, and yellow marks appear on the surface of the profile. It is not environmentally friendly, has odor, and pollutes the air.