Low phenyl silicone rubber
When the phenyl content is 5-10% (atomic ratio of phenyl group to silicon), it is generally called low phenyl silicone rubber. At this time, the curing temperature of the rubber drops to the lowest value (-115°C), which makes it have the best low temperature resistance Performance, it still has flexibility and elasticity at -100°C.

Middle Phenyl Silicone Rubber
With the increase of the phenyl content, the rigidity of the molecular chain increases, and its crystallization temperature increases instead. When the phenyl content is 15-25%, it is generally called medium phenyl silicone rubber, which has the characteristics of flame resistance.

High phenyl silicone rubber
When the phenyl content is more than 30%, it is generally called high phenyl silicone rubber, which has excellent radiation resistance. Phenyl silicone rubber is used in occasions requiring low temperature resistance, ablation resistance, high-energy radiation resistance, and heat insulation.