1. Sealing Applications
‌Engine and Transmission Seals‌
Phenyl silicone rubber, due to its high-temperature resistance (-50°C to 250°C) and oil resistance, is used in engine crankshaft seals, cylinder head gaskets, and transmission oil seals, effectively preventing lubricant leaks. For example, methylphenyl silicone rubber seals can withstand temperatures exceeding 150°C within the engine compartment.

‌Body Sealing‌
Phenyl silicone rubber is used in door and window seals, providing both dust and water resistance and sound insulation. Its weather resistance extends the vehicle's service life. Some high-end models also use a phenyl silicone resin coating to enhance the seals' resistance to UV degradation.

2. Vibration and Noise Absorption Applications
‌Suspension System Vibration Absorption‌
Phenyl silicone rubber shock absorbers are used in suspension systems and engine mounts. They absorb road vibrations through elastic deformation, enhancing driving comfort. Experiments have shown that adding silicone shock-absorbing rubber can reduce high-frequency vibration noise by over 30%.

Exhaust System Silencing
Phenyl silicone rubber silencer material is used in exhaust ducts. Its high-temperature resistance (up to 300°C) ensures stable performance even under long-term thermal cycles.

III. Electronic and Electrical System Protection
High-Voltage Insulation Protection
High-voltage wiring harnesses and battery terminals in new energy vehicles utilize phenyl silicone rubber insulation sleeves, which can withstand voltages exceeding 300V and prevent arc short circuits. Its electrical insulation performance remains stable within a temperature range of -60°C to 200°C.

Electronic Component Heat Dissipation
In power battery packs, phenyl silicone rubber thermal pads fill the gaps between battery cells, achieving a thermal conductivity of 1.5W/(m·K) and effectively balancing temperature distribution.

IV. Technical Advantages and Trends
Lightweight and Environmentally Friendly: Low-density phenyl silicone rubber seals can reduce weight by 15% while meeting VOC emission standards.

Multifunctional Integration: New phenyl silicone rubbers are being developed with combined electrical and thermal conductivity to meet the needs of smart vehicles.

In summary, phenyl silicone rubber has become a core material for sealing, shock absorption, and electrical protection in the automotive industry due to its resistance to extreme environments, high elasticity, and insulation. Its application scenarios will be further expanded in the future with the development of new energy vehicles.