What kind of aluminum alloy doors and windows everyone likes is nothing more than environmental protection, fashion, aesthetics, and good safety. These are inseparable from the doors and windows with sound insulation, heat insulation, waterproof and fireproof functions. The important parts for accomplishing these functions are the sealing strips for windows and doors. Door hardware accessories manufacturers tell you how can the sealing strips of aluminum alloy doors and windows be distinguished.

1. Judged by its appearance
Observe whether the surface of the strip is smooth and beautiful without jagged marks. The surface of sealing strip filled with soft PVC is rough, no light, large deformation. In the summer, the contact surfaces of the door and window sealing strips and the profiles are stained and discolored, and the oil leaks.

2. Judged by the touch feelings
Feel delicate and soft to the touch, moderately stretched without breaking, loosen after being bent and quickly restored to its original shape, with good elasticity. Filled PVC seals have poor strength, one fold breaks and tears.

3. Judged by the smell
The high-quality sealing strip is made of EPDM rubber. The nose smells, there is no odor, and it is green and pollution-free. The inferior sealing strip not only has a large odor, but also has a strong irritating effect on the human body. This sealing strip will soon become hard and brittle, and the sealing effect cannot be achieved.