Currently, there are mainly the following types of weather strips on the market:
- Door gaskets and window gaskets，weather seals.
- Shower seal strips, silicone door sealing tapes
- Rubber seals，which is also called rubber seal strips, including sealing strips made of EPDM, TPE, PVC and TPV door weather stripping and window seals.
- Silicone seal strips.
What are they?
PVC door seal strip
The anti-aging performance of PVC material is quite good, and even if it is used for a long time, it rarely turns yellow. When choosing, you can actually consider the use of different materials to see if it meets your own needs and create a comfortable home life experience.
Silicone sealing strips
Silicone has good elasticity and heat resistance, which extends the service life of the sealing strip to a certain extent. The plasticity of silicone is relatively good. It is widely used in all walks of life today, making it an ideal choice for door insulation strips and window seals processing, and the use efficiency is more guaranteed.
How to distinguish PVC sealing strips from silicone sealing strips?
Sealing strips are used more and more widely in life, and the sealing strip products on the market are mixed.
When buying sealing strips, how should we distinguish between inferior PVC sealing strips and high-quality silicone rubber sealing strips?
Options One:Distinguished by smell
Use your nose to smell whether there is any peculiar smell. Ordinary pvc garage weatherstrips will have a very pungent smell, and normal silicone rubber sealing strips have almost no smell.
Options Two:Place the seals in high temperature environment
Put the PVC sealing strips and silicone rubber sealing strips at high temperature for a period of time at the same time. The pvc weather strips will become very soft in a short time, and the surface of the sealing strips will have grease precipitation, dust, and yellow oil seepage, which will make your hands dirty.
Silicone for car door seals can withstand high temperatures of up to 300 ℃, and the physical properties are stable at high temperatures without any changes.
Options Three:Place in low temperature environment
Put the PVC sealing strips and silicone door weather stripping in the freezer of the refrigerator at the same time for a few hours. The PVC sealing strips will become very stiff, feel bad and break easily;.
The physical properties of silicone sealing strips will not change significantly at -50 ℃.
Options Four:Look at the glossiness of the strip surface
Sealing strips with too much filler added will be cheaper, the surface of the product is not shiny, the color is dull, the cross section of the cut sealing strip will be very rough, the feel is stiff, and there is almost no elasticity when stretched.
Silicone rubber sealing strip are bright in color, soft in feel, very elastic when stretched, and the cross section of the cut sealing strip is delicate and shiny.
Options Five:Look at the content ratio of the rubber strip
Look at the specific gravity and see how many meters can be produced per kilogram.
PVC rubber seal vendors make a lot of tricks in the use of fillers. In order to pursue greater production, some manufacturers will use talcum powder, heavy calcium and other things as fillers, which greatly increases the specific gravity of sealing strip products. (Users generally buy by kilogram and use by length, which invisibly increases the cost and seriously reduces the quality, which is not worth the loss.) After the PVC sealing strip with heavy calcium is stretched back and forth by hand several times, a small amount of white powder will appear on its surface.
The density of PVC sealing strips is generally between 1.4 and 1.6; Silicone rubber sealing strips use nano-silicon dioxide as a filler and reinforcement, with a light texture and a density ratio between 1.1 and 1.25, so the yield rate is 20% higher than that of PVC sealing strips.Options Four:
Options Six:Combustion
PVC sealing strips will bubble, shrink, emit black pungent smoke, and burn incompletely, leaving hard plastic residues;
Seal it silicone insulating strip burn almost smokelessly, odorlessly, and burn completely, and the burning material is white powder.
Summary
PVC door weatherstrips offer good anti-aging performance and rarely turn yellow with time. Silicone sealing strips have excellent elasticity and heat resistance, making them more durable and ideal for varied applications. PVC strips are detectable by their pungent smell, softness at high temperatures, stiffness in cold, and reduced elasticity with fillers, while silicone strips remain stable, odorless, and elastic across temperature ranges and burn cleanly.
