Due to the above characteristics of EPDM sealing strip, it is widely used in the market. How to identify the quality of EPDM sealing strip?
1. The rubber strips with inferior taste will have certain peculiar smell, especially the smell. The normal rubber and plastic sealing strips will only have the taste of plastic, and the ones with good quality will not smell the taste.
2. The appearance of the secondary sealing strip is very rough at first glance. The handle is also very hard. There is no tension. On the contrary, the good ones have glossy appearance, soft feel and tensile force.
3. The specific gravity of the sealing strip with secondary specific gravity is particularly heavy, that is, because the filler used in the production uses filling materials such as heavy calcium or talc powder, the specific gravity of the sealing strip will be added, while the good sealing strip will directly use light calcium carbonate as the filling material. Install the door and window sealing strip onto the profile or directly wrap it around the plastic profile and expose it to the sun at a high temperature. The secondary adhesive strip will change color directly through the high temperature. The surface will also be stained with dust, and yellowing and oil leakage will occur.
Smell it with your nose. The EPDM strip has the taste of rubber. Although it is synthetic rubber, it is still rubber, so it will also have the taste of rubber. The rubber plastic has the taste of plastic. The rubber plastic in the industry is originally modified PVC, which is a departure from the taste. Burn the rubber strip with fire. The difference between the rubber and plastic sealant strip and the EPDM sealing strip is that the burned rubber and plastic is black gray, and there will be some stickiness, which can be brushed by hand, while the burned EPDM rubber strip is white gray, and the black surface will be formed by hand. And its physical properties only change slightly under ultraviolet and other climatic conditions for a long time.
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