All About EPDM Rubber

• • 1. Basic Definition

    • Synthetic elastomer: Ethylene + Propylene + Diene monomer

    • Hardness: 60–80 Shore A

    • Temp range: -40°C to +120°C (up to 150°C)

    • Tensile strength: >7 MPa

    • Certifications: UL94 HB, RoHS, EN45545

  • 2. Structure & Production

    • Monomers

      • Ethylene: Flexibility, low-temp stability

      • Propylene: Weather & ozone resistance

      • Diene (ENB/DCPD): Crosslinking for vulcanization

    • Vulcanization: Sulfur or peroxide crosslinking

    • Advantages: Saturated backbone; UV/ozone resistance; long service life

  • 3. Key Properties

    • Weather/Ozone resistance: Excellent

    • Water/Steam resistance: Excellent

    • Temp range: -40°C ~ +130°C

    • Chemical resistance: Good (water, alkali, mild chemicals)

    • Oil resistance: Poor

    • Electrical insulation: Good

    • Flexibility: High; non‑brittle in cold

  • 4. Typical Applications

    • Automotive: Door seals, window gaskets, hoses

    • HVAC: Duct seals, pipe gaskets, vibration pads

    • Construction: Roofing membranes, waterproofing, window gaskets

    • Fluid systems: O‑rings, pipe seals, pump gaskets

    • Electrical: Cable grommets, insulation sleeves

  • 5. Comparison vs Other Rubbers

    • vs NBR: Better weather/ozone; worse oil resistance

    • vs Silicone: Lower max temp; lower cost

    • vs FKM: Lower chemical resistance; much lower cost

  • 6. Grades & Certifications

    • FDA: Food contact, potable water

    • WRAS: Drinking water systems

    • EN: Building, HVAC, automotive

    • UL: Flame‑retardant applications

  • 7. Customization

    • Hardness: 40–90 Shore A

    • Color: Any color

    • Shape: Molded, extruded, die‑cut profiles

    • Surface: Smooth, textured, flocked

  • 8. Selection Checklist

    • Oil/solvent exposure? (If yes: NBR/FKM)

    • Operating temp range

    • Required certifications (FDA, WRAS, EN, UL)

    • Hardness, color, surface finish

    • UV/weather/ozone critical?

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