Stable Corrosion Resistant EMI Shielding Gaskets
Nickel plated Aluminum (Ni/Al) Filled Silicone & Fluorosilicone

CHO-SEAL® 6502 & 6503

CHO-SEAL® Ni/Al materials provide the highest shielding effectiveness after long term aging testing of any EMI shielding elastomer gasket material. Ni/Al filled elastomers have th highest reliability, lowest need for field service and reduced warrantee needs, reducing costs by 30 to 40%

Ni/Al particles have low transfer impedance (Per SAE ARP 1705). They are both inherently stable and have the best galvanic compatibility with Al flanges. This combination delivers the best durability and
stability. Ni/Al particle filled elastomers provide the lowest amount of flange pitting due to galvanic corrosion. CHO-SEAL Ni/Al materials reduce flange pitting on all chromate treated flanges as compared to Ag/Al filled materials by 20 to 50%. Gasket designs for use in uncontrolled environments can avoid:

• Ni or Sn plating of Al flanges and housings
• Secondary outboard nonconductive gaskets
• Secondary outer enclosures
• Complicated partial flange painting

These eliminations can reduce the cost of a durable EMI gasket system up to 45%.

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