Ethylene Propylene (EP) Rubbers

Ethylene propylene rubber is known for excellent electrical insulation properties, outstanding ozone and weather resistance, good heat resistance, remarkable low-temperature flexibility, and superior resistance to polar chemicals including acids, bases, and alcohols. EPR excels in automotive weather sealing, roofing membranes, electrical insulation, and outdoor applications. 

Alternatives to EPR include natural rubber and SBR. The industry is trending toward sustainable formulations incorporating bio-based materials and grades optimized for improved processing efficiency. Various types exist including EPM (no diene, peroxide-cured, excellent heat resistance), EPDM (incorporating a diene for sulfur curability), and specialty grades with different ethylene content (typically 45-75%) affecting crystallinity and hardness, along with oil-extended versions for improved processing and cost-effectiveness.