There are many differences in performance between EPDM and silicone sealing strips. Here are some of the main differences:

1. Temperature resistance

EPDM: has excellent high temperature resistance and can usually be used in the temperature range of -40°C to 120°C. However, its low temperature resistance is relatively poor.

Silicone: has a wider temperature resistance range and can be used in the temperature range of -60°C to 230°C. Silicone rubber remains elastic and flexible at both high and low temperatures.

2. Weather resistance

EPDM: has very good weather resistance and UV resistance, and will not undergo significant aging when exposed to sunlight and ozone for a long time.

Silicone: It also has excellent weather resistance and UV resistance. It can withstand various climate conditions for a long time without aging or degradation.

3. Chemical resistance

EPDM: Very resistant to polar solvents, acids and bases, but less resistant to oils and non-polar solvents.

Silicone: has excellent chemical resistance and has good resistance to many acids, alkalis and salt solutions, but may have poor resistance to certain organic solvents and oils.

4. Physical properties

EPDM: has high mechanical strength, good elasticity and wear resistance, and is suitable for applications requiring higher mechanical properties.

Silicone: It has good elasticity, but its mechanical strength and wear resistance are not as good as EPDM. Silicone rubber has better flexibility and lower compression set.

5. Application areas

EPDM: commonly used in automotive sealing strips, door and window sealing strips, pipe seals and other applications that require weather resistance.

Silicone: widely used in food-grade and medical-grade seals, seals resistant to high and low temperature environments, electronic equipment seals and other fields that require high purity and high temperature performance.

EPDM and silicone material each have their own advantages and scope of application. Which rubber material to choose should be decided according to the specific use environment and requirements. EPDM is more suitable for outdoor high-temperature environments, while silicone rubber is suitable for extreme temperatures and applications with high purity requirements.