The quality of sealing strips is often overlooked when buying doors and windows. We will teach you how to choose them step by step, helping you improve the sound insulation effect

What is the role of sealing strips in door and window construction?

Sealing strip is one of the indispensable accessories in the installation of plastic steel doors and windows, aluminum alloy doors and windows, bridge cut aluminum doors and windows, and wooden doors and windows. It plays an important role in waterproofing, sealing, and even energy-saving insulation. Adding high-quality sealing strips will improve the sealing performance of doors and windows, and have good sound insulation and noise reduction effects.

The sealing strips on the market can be roughly divided into five types. PVC sealing strip, EPDM sealing strip, MQ silicone sealing strip, TPV elastic sealing strip TPE、TPR、SEBS）、 And thermoplastic EPDM/PP sealing strips. And which one is the most suitable high-quality sealing strip for doors and windows? Hurry up and learn with the editor.

1. Smell it

If your newly installed doors and windows always have a strange odor, even a bit pungent, then it is likely made of PVC material. The problem with PVC sealing strips is that they have poor elasticity, are prone to hardening and fracture, and have a short service life. Therefore, this PVC material sealing strip is not recommended for use on doors and windows. Good quality rubber strips should have no odor.

2. Pull and tug with your hands

Secondly, use your hands to pull and stretch the sealing strip to see how elastic it is, whether it will easily break, and whether it can rebound to its original length. We require the greater the elasticity of the sealing strip, the better it can provide better sealing, insulation, wind resistance, and cold resistance. Once the sealing strip loses its elasticity, problems such as water seepage and air leakage will follow one after another, causing you great trouble.

3. Scrape with nails

If the glossiness of the sealing strip is low and there are white marks after scraping with nails, it is likely that the material is poor or the adhesive content is not high, and it is not recommended for everyone to choose this type of sealing strip. Because it may not be used for a few years, the sealing strip will begin to age, and after installing doors and windows in the later stage, it may be slightly impacted by external forces, and the sealing strip will become unrecognizable due to poor quality.

4. Observe the surface

Some cheaper sealing strips have a lot of fillers, which makes the surface glossiness very low. Therefore, we can check whether the cross-section of the sealing strip is similar in color to its surface, in order to determine whether too much filler has been added to the material. After all, we all hope that the sealing strip has a higher adhesive content, which not only improves its physical and mechanical properties and weather resistance, but also has a better service life.

In summary, selecting suitable high-quality sealing strips is beneficial for doors and windows to better utilize their functionality and practicality. As for the choice of sealing strip material, it is mainly determined based on different indoor environments, characteristics, functions, etc. For example, for aluminum doors and windows with broken bridges, it is more suitable to use EPDM sealing strips that are resistant to high and low temperatures, aging, and have good elasticity.

In short, remember to refer to the above method when selecting sealing strips. At the same time, it is necessary to observe whether there are any bumps or scratches on the sealing strip, whether the surface is smooth and without unevenness. If there are, the quality of such sealing strips is not good, so go around!