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EMI Shielded Conductive Elastomers (Cho-Seal® and Cho-Sil®) from Chomerics

Sealing Devices offers emi shielded conductive elastomer o-rings and gaskets made of silicone, fluorosilicone, EPDM or fluorocarbon-fluorosilicone binders with fillers of pure silver, silver-plated copper, silver-plated aIuminum, silver-plated nickel, silver-plated glass, nickelplated graphite, or unplated graphite particles. Chomerics conductive elastomers and EMI shielded products feature excellent resistance to compression set over a wide temperature range, resulting in years of continuous service. All Chomerics conductive elastomers meet MIL-STD-810 requirements for fungus resistance and in addition to EMI shielding, these materials can also act as environmental or pressure seals.

CHO-Seal® emi shielded elastomers are available for both military and commercial applications, but excel in aerospace applications. Specialty shielded conductive elastomers are also available for low closure force, waveguide, and corrosive environments.

Conductive seals are available as extruded elastomers, and can be cut-to-length. They are available in many profiles including: Hollow or Solid 'D'; Hollow or Solid 'O'; Hollow 'P', rectangle, and many other shapes.  Depending on width, they can also be ordered with pressure-sensitive adhesives (PSA) applied.

Co-extruded strips provide optimal emi shielding while providing corrosion protection. When conductive and non-conductive elastomers are vulcanized together, they create a techincally superior design for aircraft doors, rack mounted cabinetry, military or commercial communications and other applications.

Material
Filler and Binder
Shielding
Remarks
CHO-SEAL 1285
silver-plated aluminum
in silicone
90-110 dB
Military gasket of choice for corrosive
environments; lightweight, 200°C max. use
temperature; good EMP resistance; molded,
extruded and reinforced.
CHO-SEAL 1287
fluorosilicone
version
CHO-SEAL 1298
silver-plated aluminum
90-110 dB
High performance in harshest corrosive environments;
material of choice for aircraft and marine military applications, good physical properties; molded, extruded or reinforced. Best corrosion resistance among Chomerics' conductive elastomers.
CHO-SEAL
S6304, S6305,6370
nickel-coated graphite in silicone
>100 dB
Good performance in moderately corrosive environments; material of choice for flange finishes needing "bite-through" for good electrical contact; flame retardant 6370 is UL 94V-0 rated.
CHO-SEAL L6303
fluorosilicone
version

CHO-SEAL 1298 gaskets are available as molded, die-cut and extruded seals. CHO-SEAL 1298 gasket material offers excellent resistance to commonly used fluids and fuels used in aviation and industrial applications.

Conductive Elastomer Gaskets

Standard Extrusions - Sealing Devices offers many shapes and types of extruded conductive elastomers from industry leader Chomerics. Below are a small sampling of the profiles and sizes available. For more profiles or sizes, please call, or refer to the full offering of Chomerics EMI shielding materials

Standard Extrusion Types/Shapes

Solid O-Strips

Hollow O-Strips

Mushroom D-Strips

Solid D-Strips

Hollow D-Strips

Channel Strips

Hollow P-Strips

V-Strips