Finding the Right Conductive Elastomer EMI Gasket For You

• Availability
• Design Flexibility
• Cost Effectiveness
• Proven Performance

Four of the reasons why CHO-SEAL^® conductive elastomer electromagnetic interference (EMI) gaskets are the right EMI shielding solution. Once used mainly to shield critical defense and aerospace electronic systems, Parker Chomerics conductive elastomers have become the progressive choice for designers of consumer, telecommunications, industrial equipment, automotive, medical devices, and much more.

Conductive elastomers are reliable over the life of the equipment, and the same gasket is both an EMI shield and an environmental seal. Elastomer gaskets resist compression set, accommodate low closure force, and help control airflow. They’re available in corrosion-resistant and flame-resistant grades. Their aesthetic advantages are obvious: almost any elastomer profile can be extruded or custom molded with modest tooling costs and short lead times for either prototypes or large orders.

Parker Chomerics offers hundreds of standard molded and extruded products, but we can also take a customer-supplied design and deliver finished parts. Molded products provide moisture and pressure sealing and EMI/EMP shielding when compressed properly in seals, flanges, bulkheads, and other assemblies. Extrusions provide similar benefits and are also readily lathe-cut into washers, spliced, bonded, kiss-cut, or die-cut to reduce installation labor and conserve material, resulting in a cost-effective alternative to other methods of EMI shielding and environmental sealing.

Product Features and Benefits:

• Nearly any shape or design possible
• Many different filler material options are available
• Cost-effective while maintaining high performance
• Available in corrosion-resistant and flame-resistant grades

Step 1. Determine Binder Material

It's very important to understand the level of chemical resistance your EMI shielding elastomer gasket will require. Below is an example table of common exposures and fluids our customers are exposed to. Generally, a silicone gasket will be the right choice, however, there will be times -- especially in military or high-end settings when an EPDM gasket is necessary.

Step 2. Determine Filler Material

Once you have determined the binder material that is appropriate for your application, it's time to determine the filler material. Our array of conductive elastomers offers true flexibility in selecting the appropriate material for a specific application based on cost and level of attenuation required. Price varies directly with shielding performance. Please view Parker Chomerics' Conductive Elastomer Engineering Handbook for further details.

Download Parker Chomerics Elastomers Selector Guide

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