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Environmental Sealing

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EMI Shielding Products



Conductive Elastomers

Conductive Elastomers are fully cured silicones or fluorosilicone loaded with a variety of highly conductive particles providing superior EMI/RFI shielding performance combined with excellent environmental sealing for dust and water. The various conductive fillers are designed to ensure galvanic compatibility whilst providing low contact resistance between mating surfaces.

Kemtron’s many years of manufacturing experience combined with quality control and compliance testing ensures our Conductive Elastomers are suitable for the most demanding situations, offering consistency time after time.

Conductive elastomers are available in the following forms:

  • Continuous Strip - Extruded Profiles
  • “O” Rings
  • Sheet & Flat Gaskets

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Knitted Wire Mesh

Knitted wire mesh gaskets provide an excellent cost effective EMI gasket, providing shielding in the magnetic as well as electric fields. Kemtron knit in four wire types, Monel, Stainless steel, aluminium and tin plated copper clad steel. Knitted mesh gaskets can be supplied as solid mesh or knitted over elastomeric cores with or without environmental seal in continuous lengths or fabricated to custom designs.

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Oriented Wires in Silicone

Solid and sponge silicone populated with vertically oriented monel or aluminium wires up to 140/sq cm. Provides excellent shielding with EMP survivability and will also provide an environmental seal. Available as sheet stock, strip or die cut to customer design and can be easily fabricated for large picture frame gaskets. Also available with self adhesive backing and compression stops or collars can be fitted to prevent over compression.

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Woven & Expanded Wire in Elastomers

Woven aluminium wire or expanded monel or aluminium sheet impregnated with silicone, fluorosilicone or synthetic rubber. Provides an excellent EMI and environmental seal, the metal reinforcement eliminates cold flow due to over compression. Available as sheet or die cut gaskets, particularly suitable for Mil connector gaskets.

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EMI Shielding Ventilation Panels

Kemtron’s EMI shielding vent panels or attenuvents are made from aluminium or steel honeycomb mounted into a frame. Many aluminium frame styles are available together with different thicknesses and configuration of honeycomb to meet different shielding requirements. Protective grilles are available for vulnerable areas together with dust filtration foams. Many plated or painted finishes can be specified.

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Conductive Fabric over Foam Gaskets

Highly conductive nickel/copper or silver plated polyester or nylon fabric over an open celled urethane core. Many profiles are available including rectangular, D shape and low compression/deflection C shape seals. These provide an excellent EMI gasket with low compression set and excellent abrasion resistance for high cycling and wiping applications. Most meet UL94V-0 and are available as strips, cut to length or die cut.

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Beryllium Copper Finger Stock

Beryllium copper EMI gaskets have superior mechanical spring characteristics and high electrical conductivity making them ideally suited to shielding application where frequent access is required such as shielded room doors. These are available in profiles to suit most EMI shielding applications including grounding. Many plating finishes are available to address galvanic compatibility concerns and enhance shielding performance.

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Form in Place Gaskets

Conductive or non conductive elastomer silicone compounds are deposited as a gasket directly to the enclosure by XYZ CNC technology. These gaskets can be very intricate small sections suitable for enclosures with no space for a traditional gasket such as thin walled multi compartment housings providing an EMI and environmental seal.

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Connector Gaskets

Kemtron has tooling for a wide range of standard MIL connector gaskets. Different materials are available to meet the demands of EMI shielding, environmental sealing, galvanic compatibility and fuel/oil resistance.

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Conductive Adhesive Tape

Available in a range of electrically conductive foils with conductive adhesive which are suitable for permanent shielding solutions or temporary fixes for EMC testing purposes. These can be supplied as a continuous roll in various widths or as die cuts shapes for specific applications.

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EMI Shielded Windows

Windows for display devices or inspection panels providing optimum transparency and EMI shielding. These are made from fine stainless steel or copper wire mesh which is laminated or embedded within a range of optical substarates. They are made to order from small sizes up to architectural window size. Clear ITO coatings are also available.

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Ferrites for EMI Suppression

Kemtron stock a wide range of Ferrites for EMI suppression. Clip on cable cores suitable for retrofitting, cable cores for round and ribbon cables, common mode chokes. Most are available from stock or on short lead times.

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Cable Shielding Jackets

Zip on type tubing with internal EMI shielding liner for shielding of bundled cables. Easy to open and close so cables can be added or removed. Tubing is available in many diameters and is suitable for static or flexible applications. Flame retardant and low smoke/low toxicity versions are also available.

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EMI Shielding Cable Glands

Kemtron’s cable entry gland provides an excellent EMI shield for screened cables which pass through enclosure walls. Made from brass they are available to suit cables from 1.5mm diameter up to 16mm. They also provide traditional strain relief for the cable.

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Conductive Adhesives

Single component RTV (room temperature vulcanising) silicone electrically conductive adhesives are available with a range of fillers from silver to nickel coated graphite. These are designed to be used as a thin bond between two components, caulking compound can also be supplied for larger gap filling. Two component epoxy systems are also available.

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EMI Shielding Laminates

Metal foils laminated to various non conductive backings, can be die cut to shape or scored and formed into a three dimensional shield. Laminates providing a cost effective light weight EMI shield that eliminate the need for conductive coatings on the inside of the enclosure.

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Microwave Absorber

Absorber materials are used for EMI isolation and RF absorption. They are available in different materials to provide absorption from as low as 5MHz up to 40 GHz. Comprising materials such as loaded urethane, silicone, nitrile and neoprene, there are many choices available to provide products that can be characterised to provide absorption at single or multiple frequencies.

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Board Level Shielding Cans

PCB shielding cans provide effective isolation of board level components. Photo etching is the most cost effective production method and being custom made, the cans can be manufactured to incorporate a range of design features to suit individual applications. Our sales department should be contacted to discuss requirements.

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EMC Product Quick Find


Honeycomb Vent Panels
Ventilation Panels - Aluminium Screen Dust Filter
Finger Stock - Beryllium Copper
Shielding Cans – Board Level Electronics
Cable Shield - Cable Shielding Jackets
Ventilation Panels - Combined EMC & Dust Filter
Conductive Adhesive Tape
Conductive Adhesives
Fabric over Foam – Conductive Fabric
Conductive Elastomers
Connector Gaskets
EMI Shielding - Windows
EMC Cable Glands
EMI Shielding Laminates
Honeycomb Vents – EMP Protection
EMI Ferrite – For EMI Suppression
Form in Place Gaskets
Knitted Wire Mesh
RF Absorption - Microwave Absorber
EMI Gasket – Oriented Wires in Silicone
EMI Shielding - Woven & Expanded Wire in Elastomers