ORIENTED WIRE IN SILICONE
AND FLUOROSILICONE RUBBER
Product Overview
Oriented wire in silicone is an RFI/EMI/EMP shielding gasket material. The sheets are available in a range of thicknesses. Each sheet
contains thousands of thin monel or aluminium wires that pass through the sheets thickness. These wires are crimped to form a
slight zigzag which means that they do not drastically affect the compression forces required to make a seal. The wire types allow
the designer to select the product best suited to their galvanic compatibility requirements. The softer blocks have a wire density of
100 wires/cm2. The harder blocks have a wire density of 140 wires/cm2. The wires are chemically bonded to the silicone or
fluorosilicone during the manufacturing process. The elastomer provides the environmental sealing component, while the wires
provide electrical grounding and the shielding aspect of the product. Under compression, the wires have bite into the mating
surface and penetrate through thin oxide layers providing low contact resistance
A choice of silicone and wire variants are available allowing this product to be used in a wide range of applications. The three
material groups are 410/420, 450/460, and 470/480.
410/420 grades are 40 Shore A solid silicone with monel/aluminium wires. These grades are for use in applications where higher
compression forces allow for better environmental sealing.
450/460 grades are 50 Shore A solid fluorosilicone with monel/aluminium wires. These grades are available for use in environments
where fuels/oils/hydraulic fluids and other contaminants are present.
470/480 grades are 20 Shore A soft silicone with monel/aluminium wires. These grades are for applications that require lower
compression forces. Kemtron Ltd developed these new grades of materials to fulfil a need that meets the performance of silicone
sponge materials but with improved environmental sealing qualities. We have achieved this by using a very soft solid silicone with a
reduced wire count of 100 wires per cm2 which is the same as silicone sponge. The advantages of these new materials over silicone
sponge are that we can manufacture increased sheet widths of up to 225mm with a minimum thickness of 0.8mm. Material
consistency is a great advantage over silicone sponge as there is no uneven cell structure to consider that can affect moisture
ingress and closure force.
Application
• A good solution for achieving RFI/EMI/EMP and environmental sealing in a single gasket
• Ideal for use as access panels, seals, connector gaskets etc
• Good conformity to allow for uneven surfaces
PERFORMANCE MATERIALS / ORIENTED WIRE IN SILICONE AND FLUOROSILICONE RUBBER
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Availability
Kemtron Ltd. is now part of TE Connectivity, can offer a wide variety of options as the in-house manufactured material is cut from
large blocks. The blocks are manufactured in either 150mm or 225mm widths. The sheets are cut using our high-speed slicer,
enabling us to offer all thicknesses (subject to material type) to suit the customer’s exact design requirement.
• Die-cut gaskets
• Large fabricated gaskets
• Sheet material
• Strip material available in continuous lengths
• Self-adhesive backing to allow for easy assembly
• Can be fitted with compression limit stops or collars
• Small gaskets can be punched in one operation, keeping production costs to a minimum
• Larger gaskets can be produced cost effectively and without the constraint of sheet size limitation from strips of material
fabricated into the required finished shape, thus avoiding waste material from the centre of
the gasket
• A fluorosilicone version is available for use in environments where fuels/oils/hydraulic fluids and other contaminants are present
• Solid silicone 410/420, for use in applications where higher compression forces allow for better
environmental sealing
• Soft solid silicone 470/480 for applications that
require lower compression forces
Design Considerations
It is important that oriented wire in silicone isn’t over compressed. If the design of the equipment does not allow for any mechanical
method of preventing over-compression, by means of a compression limiting stop, the gasket should be fitted with compression
limiters. These can be either compression stops or collars. Stops and collars are normally manufactured in a material that is suitable
for the galvanic compatibility requirements and take the form of precisely manufactured cylinders or washers.
There is no need for a conductive connection where strips or sheets are joined. This is because the wires forming the EMC contact
run through the thickness of the sheet. An environmental seal is achieved by vulcanising the mating join with the corresponding
silicone or fluorosilicone adhesive. The material is not suitable for frequent opening/closing or sliding applications. If your
application requires this functionality, please contact your customer services representative at TE Connectivity or Kemtron Ltd.
Recommended compression: 15% to 20%
Tolerances:
Sheet Widths +0.0/-5mm
Thickness ± 0.13mm
When specifying an oriented wire in fluorosilicone (450/460): self-adhesive backing (SAB) is not recommended for use
with this type of elastomer. This is due to the SAB’s component chemical’s ability to perform in line with the fluorosilicone
elastomer. Typically, SAB is supplied with a shelf life of 6 months. Minimum material width should not be less than 2mm
or at least the material thickness in any part of the gasket. If this cannot be achieved around fixing holes, consider using
a slot. Particular attention is required if specifying compression collars in holes. Particular consideration must be given to
compression forces (see data in this section) hole centres, size and number of fixings and rigidity of mating flanges.
PERFORMANCE MATERIALS / ORIENTED WIRE IN SILICONE AND FLUOROSILICONE RUBBER
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Production Capabilities
Kemtron Ltd. holds large stocks of raw material blocks, which are cut in-house on one of the most advanced slicing machines in
Europe, and which enables us to produce bespoke gaskets economically and on time.
We are able to cut sheets up to 228mm wide by 1000mm long, whilst holding a parallel tolerance of ± 0.2mm and can apply
self-adhesive backing prior to die cutting and or fabrication.
Gasket fabrication is a routine feature of our work, enabling us to produce economic gaskets by maximising material usage, without
the limitations of sheet width. Joins are vulcanised using a silicone compound and overcompression stops or collars can be fitted to
the gasket if required. Our in-house production facilities are suitable for prototype, short and medium production runs, up to
commercial quantities.
Compression Limit Applications
10mm
10mm
Limit stops min Ø 3.0mm
Limit collars
Horseshoe Slot
Horseshoe slot
Insufficient land
Minimum Land
2mm Land are (or thickness of material if over 2mm)
PERFORMANCE MATERIALS / ORIENTED WIRE IN SILICONE AND FLUOROSILICONE RUBBER
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Typical Shielding Performance
Frequency
410/450
Dimensional Tolerances
420/460
430/470
440/480
20 Mhz
94
95
94
94
40 Mhz
96
96
99
96
60 Mhz
100
97
99
100
100
80 Mhz
99
98
100
100 Mhz
111
105
109
111
200 Mhz
111
105
109
111
400 Mhz
112
107
105
110
600 Mhz
110
103
102
108
800 Mhz
116
110
109
116
1 Ghz
111
111
107
111
2 Ghz
106
112
112
112
4 Ghz
98
97
95
101
6 Ghz
91
90
89
90
8 Ghz
90
90
87
92
10 Ghz
84
89
84
88
Typical Closing Force Required
Code
Material Thickness
Compression %
N/cm2
410/420
0.8mm
10%
17
0.8mm
15%
36
0.8mm
20%
49
1.6mm
10%
20
1.6mm
15%
45
1.6mm
20%
81
2.4mm
10%
58
2.4mm
15%
83
2.4mm
20%
97
0.8mm
10%
15
0.8mm
15%
38
0.8mm
20%
61
1.6mm
10%
22
450/460
470/480
• Linear ± 0.8mm
• Hole Centres ± 0.4mm
• Thickness ± 0.13mm
• Sheet length +/- 10 mm
Handling Considerations
Care should be taken when handling this material as any
exposed metal points may scratch unprotected skin.
Material Types and Sizes
Part
No.
Material
Min
Thickness
Sheet
Width(s)
Max Sheet
Length
410
Monel wires in solid
silicone
0.8mm
225mm
(+0/-5)
1000mm
420
Aluminium wires in solid
silicone
0.8mm
225mm
(+0/-5)
1000mm
450
Monel wires in solid
Fluorosilicone
0.8mm
150mm
(+0/-5)
1000mm
460
Aluminium wires in solid
Fluorosilicone
0.8mm
150mm
(+0/-5)
1000mm
470
Monel wires in Soft solid
Silicone
0.8mm
225mm
(+0/-5)
1000mm
480
Aluminium wires in soft
solid silicone
0.8mm
225mm
(+0/-5)
1000mm
How to Order
To order strips use the material type number followed by
the thickness and width (expressed as 4 digits to one
decimal place). Add SAB to the end of the part number if
you require self-adhesive backing.
Examples
420-0008-0032SAB = 0.8mm thick aluminum wires in
solid silicone, width 3.2mm with
self-adhesive backing.
1.6mm
15%
52
1.6mm
20%
88
2.4mm
10%
78
2.4mm
15%
102
Material
2.4mm
20%
129
Monel wire in solid silicone
410
0.8mm
10%
14
Aluminium wire in solid silicone
420
Standard Strip Material
Material Code
0.8mm
15%
27
Monel in Solid Fluorosilicone
450
0.8mm
20%
36
Aluminium in Solid Fluorosilicone
460
1.6mm
10%
37
Monel wire in soft solid silicone
470
1.6mm
15%
43
Aluminium wire in soft solid silicone
480
65
1.6mm
20%
2.4mm
10%
41
2.4mm
15%
45
2.4mm
20%
55
* The above data is representative of results from tests and show forces that you should
expect to experience. When using these figures you should allow for tolerances in the
gasket material and also on the hardware. These figures are given as a guide only.
PERFORMANCE MATERIALS / ORIENTED WIRE IN SILICONE AND FLUOROSILICONE RUBBER
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Material Code
Height
Width
Part No.
410
420
450
460
470
480
0.8mm
3.2mm
0008-0032
0.8mm
4.8mm
0008-0048
0.8mm
6.4mm
0008-0064
0.8mm
9.5mm
0008-0095
0.8mm
12.7mm
0008-0127
1.6mm
4.8mm
0016-0048
1.6mm
6.4mm
0016-0064
1.6mm
9.5mm
0016-0095
1.6mm
12.7mm
0016-0127
1.6mm
15.9mm
0016-0159
1.6mm
19.1mm
0016-0191
2.4mm
4.8mm
0024-0048
2.4mm
6.4mm
0024-0064
2.4mm
9.5mm
0024-0095
2.4mm
12.7mm
0024-0127
2.4mm
15.9mm
0024-0159
2.4mm
19.1mm
0024-0191
Material Specifications
Wire
Monel
BS 3075 NA13 – QQ-N-281-B
Aluminium
BS EN 573 pt3 – Alloy 5056
Elastomers
Specifications
Temp Range
Colour
Silicone Solid
A-A-59588
-60°C to 200°C
Light Grey
Soft Silicone Solid
A-A-59588
-60°C to 200°C
Light Grey
Fluorosolicone
MIL-R-25988 G 50
-55°C to 200°C
Blue
Test
Standard
Solid Silicone
Tensile strength
ASTM D412
2.5 MPa
Elongation
ASTM D412
250%
PERFORMANCE MATERIALS / ORIENTED WIRE IN SILICONE AND FLUOROSILICONE RUBBER
6
Notice
Information supplied in these data sheets is based on independent and laboratory tests which Kemtron believes to be reliable. Kemtron Ltd. has no control over the
design of customer’s product which incorporates Kemtron’s products, therefore it is the responsibility of the user to determine the suitability for his particular application
and we recommend that the user make his own test to determine suitability. The product described in this data sheet shall be of standard quality, however the products
are sold without warranty of fitness for a particular purpose, either expressed or implied, except to the extent expressly stated on Kemtron’s invoice, quotation or order
acknowledgement. Kemtron does not warrant that products described in this data sheet will be free of conflict with existing or future patents of third parties. All risks of
lack of fitness, patent infringement and the like are assumed by the user.
Kemtron Extended Product Portfolio Contact Information
United Kingdom
Rest of Europe
Phone: +44 (0) 1376 348115
Phone: +44 (0) 1376348115
Email : info@kemtron.co.uk
Email: info@kemtron.co.uk
France
Asia
Phone: + 33 (0) 160778316
Phone: +44 (0) 1376348115
Email : info@kemtron.fr
Email : info@kemtron.co.uk
Germany
Phone: +44 (0) 1376348115
Email: info@kemtron.de
te.com
TE Connectivity, TE connectivity (logo), Kemtron Proven EMC Shielding (logo), Kemtron Limited (logo) are trademarks owned or licensed by the TE Connectivity Ltd. family of
companies. All other logos, products and/or company names referred to herein might be trademarks of their respective owners.
The information given herein, including drawings, illustrations and schematics which are intended for illustration purposes only, is believed to be reliable.
However, TE Connectivity makes no warranties as to its accuracy or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall
only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or
consequential damages arising out of the sale, resale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the
suitability of each such product for the specific application.
©2022 TE Connectivity. All Rights Reserved.
08/22 Original
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