The question of who makes the best EPDM really depends on what the material will be used for, but in the global rubber industry a few producers are consistently recognized for top performance.
ARLANXEO (Keltan®) and ExxonMobil (Vistalon®) are widely considered the highest-quality EPDM manufacturers. Their polymers offer excellent weather resistance, compression set, long-term durability, and very stable batch-to-batch consistency. These materials are commonly specified by automotive OEMs and high-end sealing product manufacturers.
Dow, Mitsui Chemicals, and Kumho Polychem also produce strong and reliable EPDM grades, with Kumho being especially popular for its cost–performance balance in extrusion applications.
At the same time, it's important to note that the best EPDM performance ultimately depends not only on the polymer supplier, but also on how the material is compounded and processed. This is where professional seal manufacturers play a critical role.
Jinjiang Yunli Technology Co., Ltd., as a specialized producer of rubber sealing strips and weatherstrips, uses high-quality EPDM raw materials from leading global suppliers and formulates them with precise compounding technology. This ensures that the final EPDM sealing products meet strict requirements for automotive, industrial, and construction applications-far beyond what raw polymer alone can achieve.
So in summary:
Best raw EPDM polymer: ARLANXEO and ExxonMobil
Best cost-effective EPDM: Kumho Polychem
Best final EPDM sealing performance: comes from experienced manufacturers like Jinjiang Yunli Technology Co., Ltd., who combine high-quality EPDM with professional compounding and advanced extrusion technology.
