EPDM (Ethylene Propylene Diene Monomer) is a synthetic rubber commonly used in automotive and constructive industries but has a disadvantage of having a lower heat resistance.
Silicone is an inorganic polymer used in many industries and applications with the advantage that it can withstand extreme temperatures and keep its physical properties. Silicone is safe to use in the food and beverage industry.
Depending on the type of silicone being used there are numerous ways to manufacture it. Silicone can come in three forms: LSR (Liquid Silicone Rubbers), RTV (Room Temperature Vulcanisation), HTV (High Temperature Vulcanisation)
|+130°C EPDM starts to degrade
|-40°C EPDM reaches brittle point
|+230°C Silicone starts to degrade
|-60°C Silicone reaches brittle point
Varying temperatures (hot or cold) have negative effects on all rubbers, particularly when heated.
Silicone is superior when it comes to needing mechanical strength under intense heat and cold resistance as well as being flame resistant. It is important to look at all of the factors that these materials will be subjected to when looking to choose what rubber will be used.
To learn more about EPDM, click here.