Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Sinopec Mitsui EPT 4045M EPDM

Sinopec Mitsui EPT 4045M EPDM is a high-performance ethylene-propylene-diene monomer rubber from the EPT series, featuring excellent heat resistance, ozone stability and compression set properties. Designed for automotive seals and industrial gaskets, it offers superior processability and aging resistance in demanding environments.
  • sinopec mitsui ept 4045m epdm_64b41da8
  • sinopec mitsui ept 4045m epdm_64b41da8

Features Of Sinopec Mitsui EPT 4045M EPDM

  1. High ethylene content for excellent compression set resistance and dimensional stability.

  2. Optimized diene type and cure system compatibility for efficient sulfur and peroxide vulcanization.

  3. Outstanding resistance to heat, ozone, weathering, and polar fluids including brake fluid and steam.

  4. Good processability on conventional rubber mixing equipment with low Mooney viscosity (ML(1+4) @ 125°C ≈ 45).

  5. Consistent batch-to-batch quality ensured by Sinopec’s ISO 9001-certified production and Mitsui’s technical support.

Typical Applications Of Sinopec Mitsui EPT 4045M EPDM

  1. Automotive weatherstripping and door seals.

  2. Roofing membranes and waterproofing sheets for construction.

  3. Industrial hoses and gaskets exposed to hot water or steam.

  4. Radiators, coolant reservoirs, and under-hood sealing components.

  5. Electrical insulation parts requiring long-term thermal and environmental stability.

Specifications Of Sinopec Mitsui EPT 4045M EPDM

Chemical TypeTerpolymer of Ethylene, Propylene, and Non-Conjugated Diene (ENB)
Product FormPellets (standard bale packaging)
AppearanceOff-white to light brown uniform pellets
Mooney Viscosity (ML(1+4) @ 125°C)43–47
Ethylene Content (wt%)58–62
Diene Content (ENB, wt%)4.5–5.5
Volatile Matter (wt%, max)0.5
Ash Content (wt%, max)0.1


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