expressed in the following aspects:  
A Excellent ozone resistance performance-EPDM rubber is known as "non-cracked rubber" and has the best ozone resistance among general rubbers. 
B Good thermal stability. 
C Excellent aging resistance--It can be used for a long time at 130℃, and can be used at intervals or short-term at 150℃ or higher. 
D Excellent weather resistance--refers to the aging of light, heat, freezing, wind, rain, ozone and oxygen in the natural environment. 
In order to avoid the entry of fire and mosquitoes, at the same time, it can also isolate the optical fiber and reduce the damage caused by the vibration to the device. The material of the sealing strip must be very high quality. Only in this way can a very good sealing effect be achieved. In general, The sealing strip is made of EPDM foam and dense compound, which has very good elasticity, and can also achieve the effect of anti-aging. In order to make the sealing strip more durable, the sealing strip has also added some Metal clamps and tongue-shaped buckles, so that the sealing strip can also be more durable.