Phenyl silicone rubber used in aerospace materials has excellent resistance to radiation degradation, excellent ozone resistance, and outstanding thermal cycling resistance. It has significant advantages because it can withstand extreme temperatures in space and maintain good flexibility at very low temperatures (other materials will harden and break). Its elastic properties can suppress the adverse effects of launch vibrations. And the performance changes encountered during space flight, such as temperature changes, can cause surface shrinkage or hinder the propagation of electromagnetic waves and subatomic particles, while phenyl silicone rubber has good high and low temperature resistance, which can effectively solve this problem.
Although radiation in space can cause changes in the properties of space materials similar to thermal aging, some special silicone materials, such as phenyl silicone rubber, have excellent radiation resistance and are suitable for use under radiation conditions while still maintaining good mechanical properties. ‍

About phenyl silicone rubber，please check the details: Methyl phenyl vinyl silicone rubber IOTA 3120