2. Material Properties Base Material: EPDM (Ethylene Propylene Diene Monomer), ASTM D2000 Type M. Hardness: 70-78 Shore A (Target 75) Tensile Strength: >7 MPa Elongation at Break: >250% Ozone Resistance (50 pphm, 40°C, 72h, 20% strain): No cracks Thermal Range: -40°C to +90°C (short-term +110°C) • UV and ozone resistant with stabilizers. • Excellent seawater and weathering resistance. • Good resistance to dilute acids and alkalis. • Not recommended for oil or fuel exposure. Color: Black Finish: Smooth extrusion skin UV stabilizers (>30 phr carbon black).
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