Conductive silicone gaskets for EMI and ip sealing
Conductive silicone gaskets ensure sealing against electromagnetic waves and fluids and particles
Conductive silicone gaskets provide EMC/EMI shielding and resistance to the external environment (IP sealing) with a single soft piece.
They are extruded in length (following a standard or custom profiles). Then delivered in coils or jointed. They can also be molded or cut to size (for flat joints, connector shielding type).
The conductive seals can be made of pure silicone (60 Shore A) or bi-material (hardness 40 Shore A).
We support you on the type of load and profile according to the specifications to be achieved and your environmental constraints.
Conductive gaskets for EMC and IP sealing, key points:
- Mechanical strength and conductivity guaranteed over time (by the stability of the silicone)
- Standard and custom profiles for extrusion
- Cutting silicone sheets for flat seals
- Fluoro-silicone available for better resistance to solvents and hydrocarbons
- Several types of fillers (Ni/C, Ag/Al, Cu/Ag)
Large catalog of standard parts available and custom-made parts possible (dimensions, thickness, materials, overmolding, etc.).
Support on the sizing of the gaskets and on integration (type of profile, groove, tightening, etc.)
Prototypes and samples on request.
EMI sealing gaskets with conductive silicone
EMI shielding gaskets with conductive silicone are extruded using a standard or a specific profile, or cut from a flat sheet of conductive silicone.
The silicone material is mixed with metallic particles (therefore conductive) to ensure electrical conductivity throughout the material. The particles used are nickel and graphite or silver and aluminum.
This conductive silicone is then extruded or molded to make electromagnetic (EM) and radio frequency (RF) shielding seals.
Extrusion can also be done simultaneously with two silicones. A charged silicone (conductive but harder) and a neutral silicone (softer and non conductive). We thus obtain bi-material seals with more interesting mechanical behavior than pure filled silicone (better flexibility and therefore better IP sealing level).
Learn more about silicone gaskets and conductive particles used
These CEM/EMI shielding seals provide excellent electromagnetic and fluid tightness (up to IP68 see IP69)
Due to their high resistance, these loaded joints are widely used on military, telecoms, medical or nuclear projects.
Silicone gaskets for EMC and/or IP can be manufactured by extrusion following a standard or custom profile. Extruded silicone shielding gaskets can be delivered by linear meter or supplied joined to a specific length.
How to choose an EMC shielding gasket? See our article on CEM/EMI shielding seals.
Kind of conductive silicone used for the manufacturing of conductive silicone gaskets
Loaded Silicone with Carbone and Nickel particles (Ni/C)
LOADED SILICONE WITH Silver AND Aluminum PARTICLES (Ag/Al)
Comparaison between Ni/C and AG/Al loaded Silicone :
Color:
- Ni/C : Dark grey
- Ag/Al : White/Grey
Volume resistivity:
- Ni/C : 0.1 Ω*cm
- Ag/Al :＜0.008 Ω*cm
Density:
- Ni/C : 2.0 to 2.3 g/cm³ ±0.1
- Ag/Al : 2.1 g/cm³ ±0.05
Hardness:
- Ni/C : 55 to 75 Shore A ±5
- Ag/Al : 65 to 78 Shore A ±5
Tensile strenght:
- Ni/C : 1.4 to 2 MPa
- Ag/Al : 1.5 to 2MPa
Elongation at break:
- Ni/C : 60 (fluorosilicone) to 100%
- Ag/Al : 30 (fluorosilicone) to 50%
Tear strength:
- Ni/C : 4.0 to 6.2 kN/m
- Ag/Al : 5.3 kN/m
Compression set:
- Ni/C : 25 to 30%
- Ag/Al : 30%
Temperature range:
- Ni/C : -45°C to +150°C
- Ag/Al : -55 to 160°C
EMI/EMC Shielding effectiveness (from 100MHz to 18GHz):
- Ni/C : 95dB to 115dB
- Ag/Al : 100dB to 115dB
Flame retardant (UL94 certification):
- Ni/C : HB to V-0
- Ag/Al : HB to V-0
Reach and RoHS certification:
- Ni/C : Certified
- Ag/Al : Certified
A project, a request ?
Catalogue des joints de blindage CEM/EMI en silicone chargé (Ni/C ou Ag/Al)
Profils de joints de blindage CEM/EMI en silicone chargé (Ni/C ou Ag/Al) extrudés ou moulés
Le catalogue ci-dessous liste les principaux profils existants.
Vous ne trouvez pas le profil de joint de blindage CEM en silicone pour votre application ? Contactez-nous
EMI shielding gaskets with extruded conductive silicone : O Type
Références/Dimensions
| Dimensions | ID (mm) | OD (mm) |
| CEHOS-2 | 0,52 | 1,02 |
| CEHOS-1 | 0,33 | 1,02 |
| CEHOS-3 | 0,60 | 1,20 |
| CEHOS-5 | 0,76 | 1,35 |
| CEHOS-4 | 0,51 | 1,35 |
| CEHOS-6 | 0,60 | 1,45 |
| CEHOS-7 | 0,60 | 1,50 |
| CEHOS-10 | 0,89 | 1,57 |
| CEHOS-9 | 0,76 | 1,57 |
| CEHOS-8 | 0,60 | 1,60 |
| CEHOS-11 | 0,76 | 1,78 |
| CEHOS-12 | 0,80 | 1,90 |
| CEHOS-13 | 1,50 | 2,00 |
| CEHOS-14 | 0,76 | 2,03 |
| CEHOS-15 | 1,02 | 2,03 |
| CEHOS-16 | 0,51 | 2,03 |
| CEHOS-17 | 1,02 | 2,09 |
| CEHOS-18 | 1,02 | 2,15 |
| CEHOS-19 | 1,02 | 2,20 |
| CEHOS-20 | 1,30 | 2,30 |
| CEHOS-21 | 1,27 | 2,35 |
| CEHOS-22 | 1,02 | 2,36 |
| CEHOS-23 | 1,50 | 2,50 |
| CEHOS-24 | 1,78 | 2,54 |
| CEHOS-25 | 1,40 | 2,62 |
| CEHOS-54 | 1,52 | 2,62 |
| CEHOS-26 | 1,62 | 2,68 |
| CEHOS-55 | 1,62 | 2,68 |
| CEHOS-27 | 1,00 | 2,80 |
| CEHOS-56 | 1,02 | 2,84 |
| CEHOS-28 | 2,10 | 2,90 |
| CEHOS-29 | 2,00 | 3,00 |
| CEHOS-30 | 1,50 | 3,00 |
| CEHOS-31 | 1,00 | 3,15 |
| CEHOS-32 | 1,14 | 3,18 |
| CEHOS-34 | 2,10 | 3,20 |
| CEHOS-33 | 1,14 | 3,20 |
| CEHOS-35 | 1,14 | 3,40 |
| CEHOS-36 | 1,80 | 3,55 |
| CEHOS-37 | 2,30 | 3,70 |
| CEHOS-38 | 2,00 | 4,00 |
| CEHOS-39 | 2,50 | 4,00 |
| CEHOS-40 | 2,50 | 4,48 |
| CEHOS-41 | 2,03 | 4,83 |
| CEHOS-42 | 2,36 | 5,33 |
| CEHOS-43 | 3,00 | 5,80 |
| CEHOS-44 | 1,90 | 6,00 |
| CEHOS-45 | 4,00 | 6,00 |
| CEHOS-46 | 3,00 | 6,45 |
| CEHOS-47 | 5,20 | 6,91 |
| CEHOS-48 | 4,00 | 7,00 |
| CEHOS-49 | 4,50 | 7,80 |
| CEHOS-50 | 2,92 | 7,92 |
| CEHOS-51 | 5,40 | 8,00 |
| CEHOS-52 | 6,00 | 10,00 |
| CEHOS-53 | 10,00 | 12,50 |
Extrusion sur mesure à la demande.
Profils possibles :
Diam. Ext. entre Ø0.8 et 13mm
Diam. Int. ≥ Ø0.33mm
Epaisseur ≥ 0.3mm
EMI shielding gaskets with extruded conductive silicone : O Ring Type
Références/Dimensions
| Dimensions | ID (mm) | CS (mm) |
| CMOR-1 | 1,25 | 0,40 |
| CMOR-2 | 2,75 | 0,75 |
| CMOR-3 | 2,80 | 0,80 |
| CMOR-4 | 3,5 | 1 |
| CMOR-5 | 4 | 1 |
| CMOR-6 | 4,40 | 1 |
| CMOR-7 | 6 | 1,5 |
| CMOR-8 | 6 | 1 |
| CMOR-9 | 6,5 | 1,8 |
| CMOR-10 | 8 | 1 |
| CMOR-12 | 9 | 1,3 |
| CMOR-11 | 9 | 1,5 |
| CMOR-15 | 10 | 1,2 |
| CMOR-17 | 10 | 1,8 |
| CMOR-14 | 10 | 1,5 |
| CMOR-18 | 10 | 1,3 |
| CMOR-16 | 10 | 1,6 |
| CMOR-19 | 10 | 1 |
| CMOR-13 | 10 | 1 |
| CMOR-20 | 11,8 | 1,8 |
| CMOR-24 | 14 | 1,2 |
| CMOR-22 | 14 | 1,2 |
| CMOR-21 | 14 | 1,8 |
| CMOR-23 | 14 | 1,5 |
| CMOR-25 | 15,49 | 1,78 |
| CMOR-26 | 15,50 | 2 |
| CMOR-28 | 16 | 2,65 |
| CMOR-27 | 16 | 1 |
| CMOR-29 | 16,8 | 2 |
| CMOR-30 | 17,5 | 1,8 |
| CMOR-32 | 18 | 1 |
| CMOR-33 | 18 | 2,65 |
| CMOR-31 | 18 | 1,8 |
| CMOR-34 | 18 | 2,65 |
| CMOR-35 | 18,54 | 1,78 |
| CMOR-36 | 22,40 | 2,65 |
| CMOR-37 | 23 | 2 |
| CMOR-38 | 24,80 | 2 |
| CMOR-39 | 25 | 2,65 |
| CMOR-40 | 25,12 | 2 |
| CMOR-41 | 25,50 | 2,65 |
| CMOR-42 | 26 | 2,65 |
| CMOR-43 | 28 | 4,50 |
| CMOR-44 | 31,50 | 2 |
| CMOR-45 | 31,80 | 2,65 |
| CMOR-46 | 32 | 2,65 |
| CMOR-47 | 36,50 | 2,65 |
| CMOR-48 | 45 | 4 |
| CMOR-49 | 54,05 | 4,80 |
Fabrication sur mesure à la demande.
EMI shielding gaskets with extruded conductive silicone : Solid O Shape
Références/Dimensions
| Référence | ID (mm) |
| CESOS-1 | 0,60 |
| CESOS-2 | 0,80 |
| CESOS-3 | 0,90 |
| CESOS-4 | 1 |
| CESOS-5 | 1,1 |
| CESOS-6 | 1,2 |
| CESOS-7 | 1,28 |
| CESOS-8 | 1,35 |
| CESOS-9 | 1,43 |
| CESOS-10 | 1,53 |
| CESOS-11 | 1,57 |
| CESOS-12 | 1,59 |
| CESOS-13 | 1,67 |
| CESOS-14 | 1,72 |
| CESOS-15 | 1,78 |
| CESOS-16 | 1,80 |
| CESOS-17 | 1,84 |
| CESOS-18 | 2,03 |
| CESOS-19 | 2,1 |
| CESOS-20 | 2,20 |
| CESOS-21 | 2,30 |
| CESOS-22 | 2,36 |
| CESOS-29 | 2,40 |
| CESOS-30 | 2,58 |
| CESOS-31 | 2,62 |
| CESOS-32 | 2,84 |
| CESOS-33 | 2,90 |
| CESOS-34 | 3,00 |
| CESOS-35 | 3,12 |
| CESOS-36 | 3,18 |
| CESOS-37 | 3,53 |
| CESOS-38 | 3,81 |
| CESOS-39 | 4,00 |
| CESOS-40 | 4,12 |
| CESOS-41 | 4,25 |
| CESOS-42 | 4,80 |
| CESOS-43 | 5,00 |
| CESOS-44 | 5,40 |
| CESOS-45 | 5,49 |
| CESOS-46 | 5,68 |
| CESOS-47 | 5,85 |
| CESOS-48 | 5,98 |
| CESOS-49 | 6,00 |
| CESOS-50 | 6,40 |
| CESOS-23 | 6,60 |
| CESOS-24 | 6,80 |
| CESOS-52 | 7,00 |
| CESOS-25 | 7,80 |
| CESOS-53 | 7,92 |
| CESOS-26 | 8,00 |
| CESOS-54 | 8,26 |
| CESOS-27 | 10,00 |
| CESOS-55 | 12,80 |
| CESOS-28 | 13,20 |
| CESOS-51 | 15,00 |
Extrusion sur mesure à la demande.
Profils possibles entre Ø0.6-13mm
EMI shielding gaskets with extruded conductive silicone : Rectangular shape
Références/Dimensions
| Dimensions | A (mm) | B (mm) |
| CERS-1 | 1,49 | 1,48 |
| CERS-2 | 1.60 | 1.07 |
| CERS-5 | 2.00 | 1.30 |
| CERS-4 | 2.00 | 2.00 |
| CERS-3 | 2.00 | 0.50 |
| CERS-6 | 2.41 | 1.57 |
| CERS-7 | 2.50 | 1.90 |
| CERS-8 | 2.92 | 0.98 |
| CERS-9 | 3.00 | 1.00 |
| CERS-10 | 3.00 | 2.50 |
| CERS-11 | 3.00 | 2.00 |
| CERS-12 | 3.00 | 0.70 |
| CERS-13 | 3.05 | 1.91 |
| CERS-14 | 3.10 | 2.00 |
| CERS-15 | 3.18 | 2.36 |
| CERS-18 | 3.18 | 2.40 |
| CERS-16 | 3.18 | 1.57 |
| CERS-17 | 3.18 | 1.02 |
| CERS-19 | 3.24 | 1.03 |
| CERS-20 | 3.70 | 1.40 |
| CERS-32 | 3.70 | 1.40 |
| CERS-22 | 4.00 | 1.60 |
| CERS-21 | 4.00 | 1.00 |
| CERS-33 | 4.00 | 1.60 |
| CERS-34 | 4.00 | 1.00 |
| CERS-35 | 4.00 | 2.00 |
| CERS-23 | 4.25 | 2.15 |
| CERS-34 | 4.50 | 1.00 |
| CERS-36 | 4.50 | 1.00 |
| CERS-35 | 4.80 | 3.20 |
| CERS-37 | 4.80 | 3.20 |
| CERS-26 | 5.00 | 0.80 |
| CERS-27 | 5.00 | 2.75 |
| CERS-39 | 5.00 | 0.80 |
| CERS-38 | 5.00 | 2.75 |
| CERS-28 | 5.20 | 3.50 |
| CERS-40 | 5.20 | 3.50 |
| CERS-29 | 5.35 | 1.57 |
| CERS-41 | 5.35 | 1.57 |
| CERS-30 | 6.00 | 1.00 |
| CERS-42 | 6.00 | 1.00 |
| CERS-43 | 6.35 | 0.81 |
| CERS-44 | 6.35 | 1.57 |
| CERS-31 | 6.35 | 0.51 |
| CERS-45 | 6.35 | 4.78 |
| CERS-46 | 6,35 | 1,00 |
| CERS-47 | 8,00 | 1,75 |
| CERS-48 | 9,00 | 1,75 |
| CERS-49 | 9,10 | 1,75 |
| CERS-50 | 10,25 | 0,77 |
| CERS-51 | 13,00 | 1,08 |
| CERS-52 | 15,00 | 1,00 |
| CERS-53 | 15,75 | 3,18 |
| CERS-54 | 20,00 | 1,50 |
| CERS-55 | 26,00 | 1,57 |
| CERS-56 | 26,10 | 1,57 |
| CERS-57 | 26,40 | 1,57 |
| CERS-58 | 29,70 | 1,57 |
| CERS-60 | 30,00 | 3,00 |
| CERS-59 | 30,00 | 1,57 |
| CERS-61 | 40,00 | 3,00 |
Profils possibles :
Largeur ≥0.8mm
Hauteur ≥0.4mm
EMI shielding gaskets with extruded conductive silicone : D Type
Références/Dimensions
| Référence | A (mm) | B (mm) | C (mm) | D (mm) |
| CEHDS-1 | 1,45 | 0,88 | 0,40 | 0,73 |
| CEHDS-2 | 2 | 1,00 | 0,50 | 1,00 |
| CEHDS-3 | 2 | 1,30 | 0,50 | 1,00 |
| CEHDS-4 | 2,77 | 3,17 | 0,60 | 1,39 |
| CEHDS-5 | 3 | 2,46 | 0,70 | 1,50 |
| CEHDS-6 | 3,18 | 2,38 | 0,80 | 1,59 |
| CEHDS-7 | 3,92 | 1,96 | 1,00 | 1,96 |
| CEHDS-8 | 4,18 | 2,39 | 1,20 | 2,39 |
| CEHDS-9 | 5,26 | 2,12 | 1,27 | 2,63 |
| CEHDS-10 | 5,26 | 2,12 | 1,57 | 2,63 |
| CEHDS-11 | 5,94 | 3,39 | 1,10 | 2,97 |
| CEHDS-12 | 6,35 | 3,18 | 0,50 | 3,18 |
| CEHDS-13 | 6,35 | 3,18 | 1,57 | 3,18 |
| CEHDS-15 | 7,92 | 3,96 | 1,27 | 3,96 |
| CEHDS-14 | 7,92 | 3,96 | 1,57 | 3,96 |
| CEHDS-16 | 8 | 5,00 | 1,00 | 4,00 |
| CEHDS-17 | 9,5 | 1,65 | 1,30 | 4,75 |
| CEHDS-18 | 10 | 8,00 | 2,00 | 5,00 |
| CEHDS-20 | 10,6 | 5,40 | 1,00 | 5,30 |
| CEHDS-19 | 10,7 | 5,45 | 1 | 5,35 |
Profils possibles :
Largeur entre 0.8mm et 13mm
Hauteur entre 0.8mm et 13mm
Epaisseur ≥0.3mm
EMI shielding gaskets with extruded conductive silicone : Solid D Type
Références/Dimensions
| Référence | A (mm) | B (mm) | R (mm) |
| CESDS-1 | 0,85 | 1,90 | 0,43 |
| CESDS-2 | 1,00 | 2,00 | 0,50 |
| CESDS-3 | 1,40 | 1,63 | 0,70 |
| CESDS-5 | 1,57 | 1,78 | 0,78 |
| CESDS-4 | 1,57 | 1,73 | 0,78 |
| CESDS-6 | 1,57 | 2,54 | 0,78 |
| CESDS-7 | 1,59 | 1,75 | 0,79 |
| CESDS-9 | 1,98 | 2,39 | 0,99 |
| CESDS-8 | 1,98 | 2,26 | 0,99 |
| CESDS-10 | 2,00 | 2,00 | 1,00 |
| CESDS-11 | 2,01 | 2,29 | 1,00 |
| CESDS-12 | 2,03 | 0,77 | 1,02 |
| CESDS-13 | 2,32 | 2,40 | 1,16 |
| CESDS-15 | 2,39 | 2,39 | 1,19 |
| CESDS-14 | 2,39 | 1,98 | 1,19 |
| CESDS-16 | 2,60 | 2,92 | 1,30 |
| CESDS-17 | 2,77 | 3,17 | 1,38 |
| CESDS-18 | 3,10 | 3,43 | 1,55 |
| CESDS-19 | 3,96 | 3,96 | 1,98 |
| CESDS-20 | 4,52 | 4,43 | 2,26 |
| CESDS-21 | 4,75 | 4,75 | 2,37 |
| CESDS-22 | 6,35 | 6,35 | 3,17 |
| CESDS-23 | 6,45 | 6,35 | 3,23 |
| CESDS-24 | 7,92 | 7,92 | 3,96 |
| CESDS-25 | 8,00 | 9,00 | 4,00 |
| CESDS-26 | 9,50 | 6,40 | 4,75 |
| CESDS-27 | 10,00 | 13,00 | 5,00 |
| CESDS-28 | 10,00 | 7,00 | 5,00 |
| CESDS-30 | 10,60 | 10,70 | 5,30 |
| CESDS-29 | 10,70 | 10,40 | 5,35 |
Profils possibles :
Largeur entre 0.8mm et 13mm
Hauteur entre 0.8mm et 13mm
EMI shielding gaskets with bi-material silicone
The EMI shielding gaskets with bi-material silicone (charged and neutral silicone) are mounted in grooves then compressed.
These EMC shielding joints are extruded using standard or custom profiles. They provide electromagnetic and fluid tightness (up to IP69).
Lear more about bi-material silicone gaskets
The bi-material EMI shielding gaskets ensure conductivity over the entire length of the joint in addition to high tightness against fluids (IP68 see IP69, subject to adequate groove sizing).
Bi-material EMC shielding gaskets are made of neutral silicone, or fluorosilicone (more resistant), and a silicone loaded with conductive particles (Ni/C or Ag/Al). These two materials are extruded simultaneously.
The filled silicone partially covers the joint section, which create a very flexible joint.
Different joint profiles are available, Compelma advises you on the profiles and grooves to define, according to your specifications.
This type of seal is very efficient in both IP sealing and shielding performance with excellent resistance over time.
Our range of bi-material seals is developed to resist corrosion and aging problems, particularly in aggressive environments: salt spray, electrolytic agents, oil, solvents, etc. Over temperature ranges from -55°C to +150°C.
If a specific extrusion profile is needed, we can design it. The extrusion profiles are guaranteed for life, so no need to worry about possible additional tooling costs.
The best way to find the best profile for your montage is to consult us!
We advise you for the best profile according to your groove or the best groove for a specific profile.
A project, a request?
EMI shielding gaskets with extruded bi-material silicone : M Type
Références/Dimensions
| Référence | A (mm) | B (mm) | C (mm) |
| CCEFMT-2 | 1,60 | 1,95 | 0,60 |
| CCEFMT-1 | 1,65 | 1,63 | 0,50 |
| CCEFMT-3 | 1,85 | 2,00 | 0,90 |
| CCEFMT-4 | 2,00 | 2,10 | 0,90 |
| CCEFMT-5 | 2,10 | 2,10 | |
| CCEFMT-6 | 3,00 | 3,00 | 0,81 |
| CCEFMT-7 | 3,00 | 3,45 | 0,81 |
| CCEFMT-10 | 3,00 | 2,95 | 1,40 |
| CCEFMT-12 | 3,10 | 3,68 | 1,94 |
Extrusion sur mesure à la demande.
EMI shielding gaskets with extruded bi-material silicone : O type (Ultra Soft)
Références/Dimensions
| Référence | A (mm) | B (mm) |
| CCESO-1 | 1,50 | |
| CCESO-2 | 1,87 | |
| CCESO-3 | 2,03 | |
| CCESO-4 | 3,20 | 1,00 |
| CCESO-5 | 3,96 | 2,36 |
| CCESO-6 | 6,30 | 4,30 |
Extrusion sur mesure à la demande.