FPM vs. Silicone

Attribute	FPM	Silicone
Material	Fluorocarbon rubber	Silicone rubber
Temperature Range	-20°C to 200°C	-60°C to 230°C
Chemical Resistance	Good resistance to oils and fuels	Good resistance to water and chemicals
Hardness	60-90 Shore A	40-70 Shore A
Elasticity	High	High

Introduction

Fluoroelastomers (FPM) and silicone are two popular materials used in various industries for their unique properties. Both materials have their own set of advantages and disadvantages, making them suitable for different applications. In this article, we will compare the attributes of FPM and silicone to help you understand which material may be more suitable for your specific needs.

Chemical Resistance

One of the key differences between FPM and silicone is their chemical resistance. FPM, also known as Viton, is highly resistant to a wide range of chemicals, including oils, fuels, acids, and solvents. This makes FPM a preferred choice for applications where exposure to harsh chemicals is a concern. On the other hand, silicone has good resistance to water, ozone, and UV radiation, but it is not as resistant to oils and fuels as FPM.

Temperature Resistance

When it comes to temperature resistance, both FPM and silicone have their own strengths. FPM can withstand high temperatures up to 200°C (392°F) without losing its mechanical properties, making it suitable for applications in high-temperature environments. Silicone, on the other hand, has a higher temperature resistance of up to 230°C (446°F), making it ideal for even more extreme temperature conditions.

Flexibility and Compression Set

Flexibility and compression set are important factors to consider when choosing between FPM and silicone. FPM has excellent compression set resistance, meaning it can maintain its shape and sealing properties even after being compressed for long periods. Silicone, on the other hand, has superior flexibility and can withstand repeated bending without losing its elasticity. This makes silicone a preferred choice for applications that require flexibility.

Cost

Cost is another factor to consider when choosing between FPM and silicone. FPM is generally more expensive than silicone due to its superior chemical resistance and temperature resistance properties. However, the higher cost of FPM may be justified in applications where these properties are critical. Silicone, on the other hand, is more cost-effective and is often used in applications where chemical resistance is not a primary concern.

Compatibility

Compatibility with other materials is an important consideration when choosing between FPM and silicone. FPM is compatible with a wide range of materials, including metals, plastics, and other elastomers, making it versatile for various applications. Silicone, on the other hand, may not be compatible with certain materials, such as certain types of plastics, due to its unique properties. It is important to consider the compatibility of the material with other components in your application.

Conclusion

In conclusion, both FPM and silicone have their own unique attributes that make them suitable for different applications. FPM is known for its excellent chemical resistance and temperature resistance, making it ideal for applications where exposure to harsh chemicals and high temperatures is a concern. Silicone, on the other hand, is valued for its flexibility, cost-effectiveness, and compatibility with various materials. When choosing between FPM and silicone, it is important to consider the specific requirements of your application to determine which material is the best fit.