Parker Chomerics Molded-In-Place Conductive Elastomer Cover Seals have been chosen for airborne, shipboard and ground based electronics equipment to meet high levels of shielding and environmental sealing requirements. In hundreds of applications, Parker Chomerics has molded our conductive elastomers onto covers machined by Parker Chomerics or provided by our customers to create a permanent seal/cover assembly with significant shielding, installation and maintainability benefits.

Parker Chomerics has in-house CNC machining capability, for fast, economical turn-around of prototypes, and developmental modifications of structural components, as well as full production capacity for components and seal assemblies. Incorporating our corrosion-resistant, silver-plated or nickel-plated aluminum filled silicones and fluorosilicones, these assemblies are particularly suited for environmentally demanding military/aerospace applications.

Our corrosion-resistant CHO-SEAL® 1285 and 1298 silver/aluminum and CHO-SEAL 6502 and 6503 nickel/aluminum gasket materials provide 90dB of shielding effectiveness at 1 GHz, excellent salt-spray resistance (MIL-STD 810), EMP survivability and a - 55° to 200°C use temperature range. Enclosure shielding and environmental sealing performance are improved in several ways when conductive elastomer gaskets are molded directly to a flange surface instead of being adhesively bonded or mechanically attached.

A Molded-In-Place gasket permits the optimum seal profile to be formed, achieving more gasket deflection with limited closure force when compared to flat, bonded gaskets. Eliminating the adhesive reduces interface resistance and maximizes shielding effectiveness. It also improves environmental sealing by eliminating the uncontrollable variations in adhesive thickness that may turn theoretically good designs into field failures.

Design and Cost Advantages over extruded or die-cut gaskets:

• Gasket Volume — typically less seal material is needed compared to die-cut gaskets, thereby reducing costs in many applications.

• Cross Section Design —compression/deflection requirements can be met with fewer fasteners, resulting in improved maintainability.

• Fastener Sealing — allows fasteners to be designed inboard or outboard of the gasket more easily, reducing both EMI and moisture leakage into the enclosure through fastener holes.

• Production Savings — the gasket, cover and compression stops become a single part, reducing the number of purchased items, inventory and documentation.

• Installation Savings —inconsistent and expensive adhesive bonding operations are eliminated.

• Field Reliability and Maintainability — damaged gaskets or covers become a 1-part replacement with little potential for error. Also, conductive gaskets will not be replaced mistakenly with ordinary non-conductive gaskets during routine maintenance.

Ordering Information:

Please reach out to our Applications Engineering team for insight into our molded in place gaskets and design support. You may submit a quote request through our website, please make note in the comments section that you require Applications Engineering support. Part numbers are custom and will be assigned individually. The part numbers listed on this website are to get you started with our quote process.

If you would like Parker Chomerics to supply your total gasket/cover assembly, send a drawing of the enclosure configuration to our Applications Engineering Department, along with your request for a quotation. If you would like us to mold CHO-SEAL elastomers to an existing cover, send a drawing or actual cover sample for evaluation. Note: Covers supplied for molding may require modification for tooling interface and must be unpainted and unplated.

Size Limitations:

Parker Chomerics can produce Molded-In-Place gasket/panel assemblies in any overall dimension larger than ¾ x ¾ in. (19 x 19 mm). Minimum recommended gasket profile cross section is 0.062 in. (1.6 mm), with a minimum thickness of 0.020 in. (0.5 mm) for flat gaskets. Smaller cross sections and thicknesses, although not recommended, can be accommodated.