EMI / RFI Shielding Materials.
Cannon Gasket die-cuts conductive stock from thin films up to half-inch foam. PSA backing available on request, all under ISO 9001. Send the attenuation target, enclosure profile, and volume. We quote material options, pricing, and lead time.
Quick facts about EMI / RFI Materials
- One gasket blocks EMI and RFI at enclosure seams, covers, and PCB-level shields, and still keeps dust and moisture out.
- Telecom cabinets, computing gear, defense avionics, medical imaging hardware, and consumer electronics all run our EMI RFI shielding gaskets.
- Material options include conductive silicone and fluorosilicone, knitted metal mesh, oriented wire, and conductive fabric-over-foam.
Request a quote for EMI/RFI shielding.
Materials & SolutionsShielding materials for
Shielding materials for
every application.
Conductive Elastomers
Silver, nickel, and carbon-filled silicone, fluorosilicone, and EPDM compounds providing EMI shielding with environmental sealing. Available filler systems include nickel-graphite, silver-aluminum, silver-copper, and silver-glass, designed to meet the requirements outlined for the MIL-DTL-83528C specification, with commercial-grade options that balance electrical conductivity and cost. Because silver-filled compounds carry higher cost and physical-property limitations (hardness, tear strength, molded sheet-size constraints, and silver price volatility), Cannon Gasket helps select or substitute the right system for the application.
Metal Mesh Gaskets
Knitted wire mesh gaskets in Monel, tin-plated copper, aluminum, and stainless steel for high-shielding-effectiveness applications.
Conductive Foam
Metallized fabric over urethane foam, lightweight, compressible shielding gaskets for electronics enclosures and covers.
Conductive Fabric-Over-Foam
Nickel-copper or silver fabric laminated to foam substrates for combined EMI shielding and environmental sealing.
Die-Cut Shielding Gaskets
Precision die-cut EMI gaskets in any profile, custom shapes, adhesive-backed, and clean-room processed as required.
Board-Level Shielding
Precision-cut shielding components for PCB-level EMI isolation in telecommunications, computing, and medical electronics.
Supply FormsHow we supply
How we supply
conductive silicone.
We supply our conductive products as an uncured moldable compound, compression molded sheetstock, and, in some cases, as a continuous roll. These options let customers convert our silicones into their own finished product using the most efficient method for them.
Uncured Moldable Compound
Conductive silicone supplied uncured so customers can mold it into their own finished parts using the most efficient method for them.
Compression Molded Sheetstock
Conductive silicone compression molded into sheetstock for in-house die-cutting, gasket fabrication, and converting.
Continuous Roll
In some cases, conductive silicone is supplied as a continuous roll for higher-volume converting and automated processing.
Industries
EMI shielding applications by industry.
Every industry generates or receives EMI at different frequencies and attenuation thresholds. Here is how our conductive gasket program maps to the most common shielding applications we support.
Telecommunications
Conductive gaskets seal 5G base-station enclosures, RF filter cavities, and backhaul cabinets against EMI leakage while surviving outdoor temperature swings and weather exposure.
Military / Defense
TEMPEST-grade shielding protects secure communications, radar, and avionics from electromagnetic pulse and signal interception. We supply conductive products for Military, Aerospace, electronics, and communications applications, with elastomers meeting the MIL-DTL-83528C specification.
Medical Electronics
MRI suite wall seams, patient monitor enclosures, and diagnostic imaging systems require high shielding effectiveness without compromising biocompatibility or clean-room handling.
Computing & Data Centers
Server racks, storage arrays, and high-speed switching equipment use conductive foam and finger-stock gaskets to meet FCC Class A/B emissions under daily service cycles.
Automotive Electronics
EV battery BMS housings, ADAS radar sensors, and ECU enclosures need both EMI shielding and environmental sealing against water, salt spray, and underhood vibration.
Aerospace Avionics
Flight computers, LCD cockpit displays, and satellite communication payloads use conductive silicone with metal mesh for lightweight shielding across aerospace temperature cycles.
Industrial Controls
Variable-frequency drives, motor controllers, and factory-floor automation panels generate and must contain emissions, a single conductive gasket handles EMI plus dust and IP sealing.
Consumer Electronics
Wearables, mobile devices, wireless charging pads, and IoT products use thin conductive foam-over-fabric to meet FCC compliance inside tight product packaging envelopes.
Frequently Asked Questions
Common questions about EMI/RFI shielding.
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.
Do EMI gaskets seal against dust and moisture too?
Most of our conductive elastomers and fabric-over-foam products seal both EMI and IP ingress in a single part. Wire mesh alone does not provide environmental sealing and is usually paired with a secondary elastomer gasket.
What shielding effectiveness can you achieve?
Depends on the material. Conductive silicone: ~70-100 dB across 100 MHz to 10 GHz. Knitted wire mesh: 90-120 dB. We work from your attenuation target, enclosure profile, and compression spec to recommend the right compound.
What types of EMI shielding gaskets do you supply?
Conductive silicone and fluorosilicone elastomers (silver, nickel, or carbon filled), knitted wire mesh (Monel, tin-plated copper, aluminum), conductive foam, fabric-over-foam, and oriented-wire strips. Die-cut to any profile, adhesive-backed on request.
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.
Need EMI/RFI shielding?
Submit your enclosure requirements and we'll recommend the right shielding material and gasket design.