How to Choose the Right Door and Window Sealing Strip?

How to Choose the Right Door and Window Sealing Strip? Is it just about the texture? In addition to the texture, there are several methods that should be clear.

Aging Resistance and Low Temperature Resistance Water and Corrosion Resistance Upgrade to 4.0 Quality

The installation and use of building doors and windows require sealing strips to achieve a closed seal between the profiles and the glass, as well as between the sash and the frame. Sealing strips play a role in fixing the glass, cushioning vibrations, and blocking water and airflow in the use of doors and windows.

The thermal insulation and air tightness of doors and windows have a significant impact on energy saving and consumption reduction in buildings. The heat loss of poorly sealed doors and windows is 5-6 times that of the heat loss of walls.

The energy efficiency of doors, windows, and curtain walls accounts for about 37-40% of building energy saving. Therefore, the sealing strip is an indispensable functional accessory for achieving energy efficiency in doors and windows.

Therefore, the following two points should be noted:

1. If there is oil seepage on the surface, those waste oils are completely incompatible with good sealing strips. The surface of the sealing strip is prone to oil stains, and yellow traces may appear on the profile surface. It may even contain many volatile substances that pollute the air.

2. When the so-called plasticizers volatilize or exude, the sealing strip will lose its original flexibility, become hard, and quickly age and shrink. As a result, the originally sealed doors and windows will have large gaps and poor airtightness (leakage, dust ingress). Especially in steel-lined plastic doors and windows, the steel lining will be quickly corroded. Sometimes, we often find a lot of dirty red liquid flowing from the pressure strip of the window during the rainy season, which means that the steel lining of the leaking doors and windows is corroded prematurely, greatly reducing the lifespan of the doors and windows.

In the actual production process, the proportion of sealing strips is very small, but their role cannot be ignored. The identification method is very simple:

1. Smell it with your nose to see if there is any odor. Normal good rubber materials will have a slight alcoholic smell, which is almost imperceptible.

2. Wrap the sealing strip tightly around the profile and place it in a high temperature environment (on the roof or in a place with sufficient sunlight) for a period of time. Check whether there is contamination or discoloration on the contact surface between the profile surface and the sealing strip, and whether the surface of the sealing strip is yellowed (it is easy to absorb dust if there is oil) or oily, and whether it gets dirty when touched.

3. Some cheap sealing strips will have a lot of fillers, so the surface will not be very shiny. It is not advisable to choose those with a dull appearance and low price.

4. Check the weight and the length of sealing strip that can be produced per kilogram. Many manufacturers manipulate the fillers to pursue higher production volume (save a little electricity), using things like talcum powder and heavy calcium as fillers, greatly increasing the weight of the sealing strip products, resulting in a decrease in the length of sealing strip produced per kilogram. Sealing strips with heavy calcium, when stretched by hand several times, will produce a small amount of white powder on the surface.

Most of the sealing strip materials for doors and windows use EPDM rubber, which is resistant to aging, low temperature, water and chemical corrosion, especially EPDM rubber that is resistant to ozone aging. This EPDM rubber also has good processability and can be combined with steel strips, steel wire braids, flannel, velvet, PU coatings, organic silicon coatings, etc., to ensure waterproofing, leak-proofing, dust-proofing, sound insulation, heat insulation, vibration reduction, and decorative effects between indoors and outdoors. Under normal circumstances, the service life of EPDM sealing strips can reach several decades.

The sealing strip 4.0 for sealing corners adopts EPDM ethylene propylene diene monomer material, which has good weather resistance, ozone resistance, and aging resistance; good comprehensive physical and mechanical properties; and excellent resistance to light oxidation. These characteristics make the sealing strip 4.0 much better than the above three types of sealing strips. The seamless welding technology and EPDM ethylene propylene diene monomer material ensure that the sealing strip 4.0 has excellent compression permanent ability, ensuring appropriate dynamic sealing force, excellent weather resistance, sufficient service life, and excellent flexural resistance, ensuring its service life.