RFI / EMI Shielding Gaskets

When an electronic enclosure must seal mechanically and contain electromagnetic interference, an RFI / EMI shielding gasket does both. Cannon Gasket cuts custom EMI shielding gaskets in a range of conductive elastomers, wire mesh composites, and metal-filled silicone formulations.

Durometer
0.010" to 0.250" thickness
Highlight
High electrical conductivity
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Custom RFI / EMI Shielding gaskets from Cannon Gasket
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Properties of RFI / EMI Shielding gaskets

Cannon Gasket cuts RFI / EMI Shielding gaskets to your drawing in durometer and thickness specifications of 0.010" to 0.250" thickness. Grade-dependent. Most conductive elastomers provide good moisture resistance and moderate chemical resistance alongside their primary shielding function.

RFI / EMI Shielding tolerances and customization

Standard dimensional tolerances on RFI / EMI Shielding gaskets land around ±0.010" to ±0.015" on OD and ID, depending on material durometer and thickness. Tighter tolerances are available on selected grades. Cannon Gasket cuts RFI / EMI Shielding to custom profiles in-house and matches lead times to your production volume. PSA backing, pad printing, custom packaging, and kitting are all on the menu when you need them.

Material Families

- Conductive silicone — silver-, copper-, or nickel-filled silicone for shielding plus environmental sealing. - Conductive fluorosilicone — for fuel and chemical environments combined with EMI shielding. - Wire mesh in elastomer — for mechanical seal plus high-attenuation shielding. - Metal-mesh-only gaskets — for pure shielding without environmental sealing.

How EMI Gaskets Perform

- Shielding effectiveness from 60 dB to 120 dB across MHz to GHz frequencies, material dependent. - Environmental sealing on conductive elastomer grades. - Custom durometers and conductivity levels matched to the chassis. - Class 10,000 clean room production for sensitive electronic and semiconductor work.

Where EMI Shielding Gaskets Are Specified

Server racks and chassis, telecommunications enclosures, defense and aerospace electronics, medical imaging systems, semiconductor process tools, and any electronics enclosure with FCC, CE, or MIL-STD EMC compliance requirements.

Conductive Silicone vs Fluorosilicone

When the enclosure sees fuel, oil, or aggressive chemical exposure alongside the EMI requirement, fluorosilicone is the material. For air and indoor environments, silicone is more economical with equivalent shielding.

Cutting Methods

Flash cutting, compound die cutting, and rotary die cutting. Pad printing for orientation marks and part numbers on assembly-line installation.

Request a QuoteRFI / EMI Shielding GasketsDownload PDFPrint-ready spec sheetClaude SkillExpert prompt .md
Key Properties
  • Thickness: 0.010" – 0.250"
  • High electrical conductivity
  • Effective EMI/RFI shielding
  • Environmental sealing
  • Conductive elastomer & fabric grades
Engineering Tools
Applications
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Frequently Asked Questions

Common RFI / EMI Shielding questions.

Are you ISO 9001 certified?
Yes, ISO 9001:2015 certified. Documented quality management covers incoming material verification, in-process inspection, calibrated measurement, final inspection, non-conformance handling, corrective action, and full lot traceability. AS9100-ready for aerospace, with MIL-spec and FDA 21 CFR 177.2600 / USP Class VI grades available on request.
Can you cut custom gasket profiles?
Yes. Custom steel-rule and rotary tooling is built in-house from your drawing or DXF. Complex profiles, multiple through-cuts, tight bolt patterns, and irregular perimeters are all standard work.
Can you supply PSA-backed gaskets?
Yes. Pressure-sensitive adhesive backing is a standard option on most rubber and fiber gasketing, with either permanent or removable liners. Kiss-cut on liner and through-cut both supported on flatbed and rotary presses.
What tolerances can you hold on gasket dimensions?
Standard die-cut tolerance is ±0.010 to ±0.015 inch on OD and ID, depending on material durometer and thickness. Tighter tolerances are available on select grades and thicknesses. Ask if your drawing specifies something tighter and we will confirm feasibility during the quote.
Which gasket material is right for my application?
Start with temperature range, fluid contact, and regulatory requirements. Buna-N is the default for oil and fuel. EPDM for weather, water, and steam. Silicone for extreme temperature and FDA grades. Viton for aggressive chemicals. Our gasket material selection guide walks through the decision framework.
How fast do you return a quote?
Most RFQs come back within one business day. Simple profile updates to an existing tool quote same-day. Send a drawing, DXF, or competing part number and our engineering team reviews material, tolerance, and volume before pricing.
What is the minimum order quantity?
Minimums depend on the part and material. We cut prototype and first-article quantities for engineering evaluation, then scale up to production volumes from the same tooling. For high-volume programs we run JIT, VMI, and Kanban replenishment out of Fontana, California.
What should I send with an RFQ?
Ideal: a drawing or DXF, material spec (or compound family), estimated annual volume, and any regulatory callouts (FDA, USP Class VI, AS9100, MIL-spec). If you only have a sample or a part number from a competing supplier, send that and we will reverse-engineer the spec before quoting.
What are typical lead times?
Prototype and first-article parts usually ship in 5-10 business days. Production runs from existing tooling are 2-3 weeks depending on volume and material lead time. Rush and expedite options available on a case-by-case basis.
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From prototype to production, any shape, any volume.
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ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971