EPDM vs Silicone Rubber: Which Is Better for EV Battery Pack Sealing?
Choosing the wrong battery pack gasket can allow water, dust, coolant, and road salt to enter the enclosure, causing corrosion, high-voltage isolation faults, vehicle shutdown, or costly recalls. EPDM is generally the practical choice for water, weather, ozone, and glycol-coolant exposure, while silicone rubber is preferred when wider temperature resistance and long-term elasticity are critical. The final material must still be selected from the actual pack temperature, fluid exposure, compression, fire requirement, and enclosure design.
Choosing the wrong battery pack gasket can allow water, dust, coolant, and road salt to enter the enclosure, causing corrosion, high-voltage isolation faults, vehicle shutdown, or costly recalls. EPDM is generally the practical choice for water, weather, ozone, and glycol-coolant exposure, while silicone rubber is preferred when wider temperature resistance and long-term elasticity are critical. The final material must still be selected from the actual pack temperature, fluid exposure, compression, fire requirement, and enclosure design.
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