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Conductive Silicone | Exshield

Specifications

E Shielding Properties
Shielding Series		EC-Q	EC-G	EC-J	EC-H	EC-S	EC-C
Filler	Test Method	Nickel Graphite	Silver Glass	Silver Aluminium	Silver Copper	Silver Pure	Carbon
Upper Operating Temp. Degrees C		+160	+160	+160	+160	+160	+160
Lower Operating Temp. Degrees C	ASTM D-1329	-50	-50	-50	-50	-50	-50
Specific Gravity (±5%)	ASTM D-792	1.99	1.75	2.00	3.02	3.20	1.19
Hardness Shore A (±5)	ASTM D-2240	60	60	65	60	75	70
Elongation % (min)	ASTM D-412	100	80	175	100	100	150
Compression Set %	ASTM D-395	30	30	30	30	30	20
Tensile Strength Mpa (min)	ASTM D-412	1.00	0.90	0.90	1.00	1.25	5.00
Volume Resistivity ohms/cm (max)		0.1	0.05	0.008	0.008	0.002	9.00

Shielding Effectiveness (dB)	MIL-G-83528 MIL285
200 KHz (H-Field)		70	55	70	75	70	30
100 MHz (E-Field)		95	95	110	110	115	65
500 MHz (E-Field)		90	90	105	120	115	60
2 GHz (Plane Wave)		90	90	100	120	115	40
10 GHz (Plane Wave)		90	90	100	120	115	30

Download the Conductive Silicone Range as a PDF

General Information

Our conductive silicone gaskets are constructed from silicone containing metal powder fillers which combine to produce high levels of attenuation with excellent environmental shielding and a high level of conductivity. Many types of filler, from nickel to pure silver, are available to suit a wide range of applications. There are also Fluorosilicone variants for use in the presence of hydrocarbon contamination.

Applications

The Conductive Silicone Shielding Range was originally developed for high performance shielding mainly for military applications. However, the introduction of lower cost fillers has now made them accessible to the commercial sector. They are used where environmental and EMI screening is required but space constraints or stringent environmental protection necessitates a small cross section profile, often fitted into a groove or channel.

Conductive silicone is best used where mating surfaces are smooth and well machined. They should be mounted to provide adequate voulme for the material to deflect under pressure and should be compressed by between 8 and 20% of their relaxed height for solid sections and between 20 and 100% of the height of the hollow centre of tubular sections. Moulded 'O' rings, gasket profiles and sheet materials all have their own compression characteristics according to how they are mounted and do not comply with the guidelines above.