Custom Silicone Profile
Extruded profiles manufactured to drawing with certified formulations for every industrial sector. From functional prototypes to full production runs.
A custom silicone profile is developed when standard sections do not fit the application. Specific geometries, multi-durometer configurations within a single part, or particular regulatory requirements demand a ground-up design. The starting point is a CAD drawing or physical sample; the result is an extruded profile that precisely meets the operating conditions.
We manufacture profiles with cross-sections from 2 mm to 200 mm wide, in quantities from functional prototypes to industrial production runs. We hold over 20 proprietary formulations covering everything from general-purpose silicone to compounds engineered for cryogenic service (–110 °C), continuous high temperature (+300 °C), fuel resistance, or EN 45545-2 rail compliance. Compound selection determines the final properties of the profile.
Each development progresses through tooling design, extrusion parameter optimisation and dimensional validation prior to production. Manufacturing takes place in an ISO 9001 and ISO 13485 certified environment, with an ISO 8 cleanroom available for medical applications. Profiles are supplied on reels or cut to length, with batch certificate and full traceability.
Standard or custom profile?
If your application requires a specific geometry, a combination of materials, or a particular certification not found in our catalogue, bespoke development is the way forward. If you need circular, square or rectangular sections in common dimensions, check our standard profiles first.
Profile types by construction
Solid profile (compact)
Single-compound solid cross-section. The most common construction for sealing gaskets, guides and sealing elements where uniform mechanical resistance is required. Available in all catalogue formulations.
Applications: P-section, T-section, U-section, D-section gaskets, perimeter seals, sliding guides.
Sponge profile (cellular)
Expanded silicone with closed-cell structure. Delivers superior compressibility at low closure forces, ideal for seals where the substrate cannot withstand high pressure. Density range 0.5–0.8 g/cm³.
Applications: Door seals, compression gaskets for lightweight panels, acoustic insulation.
View sponge profiles
Co-extruded profile (multi-layer / multi-durometer)
Two or more materials extruded simultaneously in a single part. Enables combination of a rigid base for anchoring with a flexible lip for sealing, or integration of materials with different properties in specific zones of the profile.
- 70 Shore A base + 40 Shore A lip
- Solid core + cellular exterior
- Standard silicone + conductive silicone at contact zone
Applications: Glazing gaskets, seals with combined mounting and sealing requirements, two-colour profiles for identification.
Profile with insert
Profile extruded over a metal, textile or other core to increase tensile strength, rigidity, or facilitate installation. The insert is embedded during extrusion.
Applications: Profiles under tensile load, push-fit gaskets, seals in high-vibration environments.
Extruded profile sections and geometries
Profile geometry determines sealing behaviour, mounting method and required closure force. Each cross-section exhibits different mechanical response under compression. Selecting the correct shape is as critical as choosing the material.
D-Section Profile
Hollow semi-circular sectionThe hollow chamber deforms to absorb impact with minimal closure force. The flat base bonds or mechanically fixes to the substrate. This is the most widely used geometry where sealing with shock absorption is required.
- Base width
- From 5 mm
- Height
- From 4 mm
- Wall thickness
- Minimum 1 mm (solid), 1.5 mm (sponge)
- Closure force
- Low to medium
Variants: Solid, sponge, co-extruded (rigid base + flexible bulb).
P-Section Profile (Bulb Seal)
Bulb with anchor foot or lipThe bulb provides the contact surface and compressibility. The anchor foot inserts into a groove or channel in the frame. This is the reference gasket for glazing and bodywork applications.
- Bulb diameter
- From 6 mm
- Foot width
- To suit destination groove
- Recommended compression
- 15–25 % of bulb diameter
- Closure force
- Medium
Variants: Solid, sponge, with integrated metal clip, co-extruded.
U-Section / C-Section Profile
Open channel for edge protectionPress-fits over the edge of a sheet, panel or frame. Protects the edge and may incorporate a side sealing lip. Retention depends on the internal channel geometry and material hardness.
- Channel opening
- To suit substrate thickness (typical 1–5 mm)
- Side lip
- Optional, for additional sealing
- Recommended hardness
- 50–70 Shore A for good retention
Variants: With single lip, with double lip, with internal metal reinforcement.
T-Section Profile
T-section for groove mountingThe stem inserts into a groove while the upper wings seal against the surface. Highly stable against lateral displacement.
- Wing width
- To suit required contact surface
- Stem depth
- To suit groove depth
Variants: Symmetrical, asymmetrical, with sealing lips on wings.
E-Section Profile (double lip)
E-section with dual contactCombines groove retention with dual sealing points. The two lips provide redundancy or allow sealing against surfaces at different heights.
- Lip separation
- To suit gap tolerance
- Lip thickness
- Minimum 0.8 mm
Variants: With rigid lip + flexible lip (co-extruded).
Single Lip Profile
Flexible blade with anchor baseThe lip acts by light contact against the opposing surface. Dynamic sealing with very low friction. Ideal where there is relative movement between parts.
- Lip length
- To suit distance to contact
- Lip thickness
- 0.5–2 mm
- Attack angle
- Defined by application
Variants: Single, double, with reinforced base.
Hollow Tubular Profile
Closed section with internal cavityThe internal cavity allows compression at very low closure force with excellent elastic recovery. Not to be confused with conveying tubing: here the function is sealing, not fluid transport.
- Outside diameter
- From 4 mm
- Wall thickness
- Minimum 1 mm
- Closure force
- Very low
Variants: Circular, oval, with side fixing fin.
Solid Cord Profile
Solid circular sectionSolid section without cavity. Used as base stock for vulcanised O-ring fabrication, buffers, dampers and groove seals.
- Diameter
- 1 to 50 mm
- Groove compression
- 15–30 % of diameter
Variants: Circular, square, rectangular section.
View standard cordsAny geometry can be manufactured in solid, sponge or co-extruded form depending on application requirements. Special geometries (omega, trapezoidal, asymmetric, multi-lobe) are developed to drawing.
Which material does your profile need?
General-purpose silicone
The default choice when there are no special chemical, thermal or regulatory requirements. Good mechanical properties, wide hardness range and competitive cost.
Prototypes, general machinery, industrial seals without specific regulatory requirements.
| Property | VMQ Peroxide (Series 2) | VMQ Platinum (Series 12) |
|---|---|---|
| Certifications | FDA, CE 1935/2004, BfR, USP Class VI | FDA, CE 1935/2004, BfR, USP Class VI, ISO 10993 |
| Hardness range | 10–90 Shore A | 20–90 Shore A |
| Tensile strength (MPa min) | 3.5–9.5 | 6–9 |
| Elongation (% min) | 125–950 | 100–1000 |
| Tear strength (kN/m min) | 10–23 | 17–30 |
| Density (g/cm³) | 1.07–1.23 | 1.11–1.20 |
| Temperature range | –60 to +200 °C | –60 to +200 °C |
| Extended range | Up to +300 °C with additive | Up to +300 °C / +315 °C with additive |
Series 12 (platinum-cured) offers higher purity and is preferred for food and medical applications. Series 2 (peroxide-cured) is more economical for general industrial use.
High tear strength silicone
When the profile is subject to frequent assembly/disassembly, repeated mechanical stresses or tension during installation, tear resistance is the critical factor. These compounds double or triple the tear value of standard silicones.
Glazing profiles, inflatable seals, profiles with fine geometries (lips, fins), vibration environments.
| Property | HT Peroxide (Series 1) | HT Platinum (Series 10) | HT + Abrasion (Series 7) |
|---|---|---|---|
| Certifications | FDA, CE 1935/2004, BfR | FDA, CE 1935/2004, BfR, USP VI, ISO 10993 | FDA |
| Hardness range | 40–70 Shore A | 40–80 Shore A | 60 Shore A |
| Tensile strength (MPa min) | 6–8 | 7–9 | 6.9–8 |
| Elongation (% min) | 500–600 | 320–760 | 400 |
| Tear strength (kN/m min) | 26–40 | 33–55 | 30–35 |
| Density (g/cm³) | 1.12–1.19 | 1.12–1.24 | 1.19 |
| Temperature range | –60 to +200 °C | –60 to +200 °C | –60 to +230 °C |
Series 10 (platinum-cured) achieves up to 55 kN/m tear strength — exceptional for silicone. Series 7 adds abrasion resistance for friction environments.
Flame-retardant rail silicone (EN 45545-2)
Rolling stock requires profiles that comply with EN 45545-2 for fire, smoke and toxicity performance. Requirement sets R22 and R23 are the most common for gaskets and seals in vehicle interiors.
Rolling stock manufacturers, rail interior integrators, fleet maintenance.
Solid for extrusion (Series 16 — PEQ)
| Hazard levels achieved | HL1, HL2, HL3 (R22 and R23) |
| Limiting oxygen index (LOI) | 32.7 % |
| Smoke optical density (Ds max) | 84.7 |
| Toxicity index (CIT) | 0.06 |
| Hardness range | 30–85 Shore A |
| Validated colours | Black RAL 9017, Blue-black RAL 5004 |
| Tested thickness | 3 mm |
Solid for moulding (Series 16 — PMQ)
| Hazard levels achieved | HL1, HL2, HL3 (R22 and R23) |
| Limiting oxygen index (LOI) | 35.1 % |
| Smoke optical density (Ds max) | 45 |
| Toxicity index (CIT) | 0.06 |
| Hardness range | 30–85 Shore A |
| Validated colours | Black RAL 9017, Grey, Cream |
| Tested thickness | 3 mm |
Flame-retardant sponge (Series 33)
| Hazard levels achieved | HL1, HL2 (R22 and R23) |
| Limiting oxygen index (LOI) | 29 % |
| Smoke optical density (Ds max) | 62.1 |
| Toxicity index (CIT) | 0.05 |
| Validated colours | Black, Grey, Cream |
| Tested thicknesses | 3 mm and 10 mm |
Typical geometries
- Bulb seal for access doors
- Window gasket with contact lip
- Gangway profile between coaches
- Perimeter seal for interior panels
Results correspond to the thicknesses indicated. For different thicknesses, consult certification feasibility. Tests performed by external laboratory to NF EN 45545-2:2020.
Food-grade silicone
Profiles in contact with food require formulations certified for the target market: FDA 21 CFR 177.2600 for USA, Regulation CE 1935/2004 for Europe, or BfR for Germany.
Food machinery manufacturers, packaging equipment, food processing, dairy and beverage industry.
| Property | General purpose (Series 2/12) | High tear (Series 10) | Sponge (Series 15) |
|---|---|---|---|
| Certifications | FDA, CE 1935/2004, BfR | FDA, CE 1935/2004, BfR, USP VI | FDA, CE 1935/2004, BfR |
| Hardness range | 10–90 Shore A | 40–80 Shore A | — |
| Tensile strength (MPa min) | 3.5–9.5 | 7–9 | 3 |
| Elongation (% min) | 125–950 | 320–760 | 600 |
| Tear strength (kN/m min) | 10–23 | 33–55 | 15 |
| Density (g/cm³) | 1.07–1.23 | 1.12–1.24 | 0.5–0.8 |
| Temperature range | –60/+200 °C | –60/+200 °C | –60/+200 °C |
Use of certain pigments may invalidate food-contact certification. Consult compatibility before specifying colour.
Medical and pharmaceutical silicone
Demonstrated biocompatibility per USP Class VI or ISO 10993, manufactured in ISO 8 cleanroom validated to ISO 14644. From external devices to compounds validated for short-term implantation.
Medical device manufacturers, laboratories, pharmaceuticals, diagnostic equipment.
Medical devices (Series 12)
| Certifications | USP Class VI, ISO 10993, FDA, CE 1935/2004 |
| Manufacturing | ISO 8 cleanroom |
| Hardness range | 20–90 Shore A |
| Tensile strength (MPa min) | 6–9 |
| Elongation (% min) | 100–1000 |
| Tear strength (kN/m min) | 17–30 |
| Temperature range | –60 to +200 °C |
Short-term implantable <29 days (Series 17 — NUSIL grade)
| Certifications | USP Class VI, ISO 10993 |
| Manufacturing | ISO 8 cleanroom |
| Hardness range | 25–80 Shore A |
| Tensile strength (MPa min) | Up to 10.8 |
| Elongation (% min) | Up to 1200 (exceptional) |
| Tear strength (kN/m min) | Up to 46.7 (exceptional) |
| Temperature range | –60 to +200 °C |
| Options | Radiopaque additive available |
Peristaltic pumps (Series 30)
| Certifications | FDA, USP Class VI, ISO 10993 |
| Manufacturing | ISO 8 cleanroom |
| Hardness range | 50–65 Shore A |
| Tensile strength (MPa min) | 8–8.8 |
| Elongation (% min) | 400–500 |
| Tear strength (kN/m min) | 17–39 |
| Temperature range | –60 to +180 °C |
Suction tubing manufactured with EQ1260T formulation is validated for integration into CE-marked medical devices.
High-temperature silicone
When operating temperature exceeds the +200 °C limit of standard silicones. Formulations with thermal stability up to +300 °C continuous and +315 °C peak.
Industrial ovens, sterilisation equipment, vulcanisation machinery, high-temperature autoclaves.
| Property | Maximum T (Series 9) | HT + High T (Series 20) | HT + Abrasion (Series 7) |
|---|---|---|---|
| Certifications | FDA | FDA | FDA |
| Continuous temperature | –60 to +300 °C | –60 to +270 °C | –60 to +230 °C |
| Peak temperature | +315 °C | — | — |
| Hardness range | 40–70 Shore A | 45–70 Shore A | 60 Shore A |
| Tensile strength (MPa min) | 6–8 | 7–8 | 6.9–8 |
| Elongation (% min) | 300–400 | 400–550 | 400 |
| Tear strength (kN/m min) | 12–17 | 30–36 | 30–35 |
| Density (g/cm³) | 1.11–1.20 | 1.12–1.20 | 1.19 |
Series 20 combines high temperature with high tear strength — ideal when the profile operates hot and experiences simultaneous mechanical stress.
Cryogenic silicone (PVMQ)
Standard silicones maintain flexibility down to –60 °C. Below this, phenyl silicone (PVMQ) is required, which retains elasticity to –110 °C thanks to phenyl groups that prevent crystallisation.
Biological cryopreservation, liquid nitrogen containers, climatic chambers, aerospace industry, low-temperature research.
| Property | PVMQ (Series 5) |
|---|---|
| Temperature range | –110 to +200 °C (+215 °C with additive) |
| Hardness | 50 Shore A |
| Tensile strength (MPa min) | 8 |
| Elongation (% min) | 550 |
| Tear strength (kN/m min) | 28 |
| Density (g/cm³) | 1.21 |
Excellent performance under vibration at low temperature. Good tear resistance.
Fluorosilicone fuel-resistant (FVMQ)
When the profile will be in contact with hydrocarbons, mineral oils or organic solvents, standard silicone (VMQ) swells and degrades. Fluorosilicone (FVMQ) offers far superior chemical resistance due to trifluoropropyl groups.
Aerospace (fuel tanks), hydraulic systems, lubrication circuits, engines and transmissions.
| Property | FVMQ (Series 13) |
|---|---|
| Temperature range | –60 to +170 °C (up to +220 °C with additive) |
| Hardness range | 40–70 Shore A |
| Tensile strength (MPa min) | 6–7 |
| Elongation (% min) | 160–400 |
| Tear strength (kN/m min) | 10–21 |
| Density (g/cm³) | 1.40–1.46 |
Chemical resistance
- Aviation fuels (Jet A, JP-8)
- Mineral and hydraulic oils
- Aromatic solvents (toluene, xylene)
- Brake fluids
- Engine oils
FVMQ density (1.40–1.46 g/cm³) is significantly higher than standard VMQ (1.10–1.20 g/cm³). Consider in weight calculations for aerospace applications.
Electrically conductive silicone
Carbon-filled formulation for electrostatic discharge (ESD) dissipation or electromagnetic interference (EMI) shielding. Controlled volume resistivity.
Electronics, ESD-sensitive equipment, ATEX environments, cabling and connector assemblies.
| Property | Conductive (Series 11) |
|---|---|
| Volume resistivity | 4–12 Ω·cm |
| Temperature range | –50 to +210 °C |
| Hardness range | 50–70 Shore A |
| Tensile strength (MPa min) | 5 |
| Elongation (% min) | 100–250 |
| Tear strength (kN/m min) | 5–10 |
| Density (g/cm³) | 1.11–1.16 |
| Colour | Black only |
Available in black only due to conductive filler. Mechanical properties are lower than standard silicones. Extrusion possible subject to feasibility study.
Steam and autoclave resistant silicone
Repeated cycles of pressurised saturated steam degrade standard silicones: loss of elasticity, hardening, cracking. Optimised formulations maintain properties after hundreds of cycles.
Hospital and industrial autoclaves, sterilisation, dairy and brewing industry, CIP cleaning.
| Property | Steam + oils (Series 14) | Steam + aromatics (Series 22) |
|---|---|---|
| Certifications | FDA, BfR | FDA |
| Temperature range | –60 to +200 °C | –60 to +200 °C |
| Hardness range | 60–70 Shore A | 40–80 Shore A |
| Tensile strength (MPa min) | 8 | 6.4–7.9 |
| Elongation (% min) | 300–360 | 130–390 |
| Tear strength (kN/m min) | 15–18 | 9.5–14 |
| Density (g/cm³) | 1.16–1.20 | 1.11–1.36 |
Series 14 offers good compression set retention after autoclave cycles and resistance to cooling fluids. Series 22 is formulated for contact with aromatic oils at low concentrations.
Low compression set silicone
In applications where the gasket is permanently compressed (flanges, bolted covers), compression set determines seal service life. This formulation minimises permanent deformation.
O-rings for permanent flanges, bolted cover seals, damping systems, any gasket compressed for years.
| Property | Low CS (Series 4) |
|---|---|
| Certifications | FDA |
| Compression set (70h / 150 °C) | 11–18 % (very low) |
| Temperature range | –60 to +200 °C |
| Hardness range | 40–80 Shore A (moulding) / 40–75 Shore A (extrusion) |
| Tensile strength (MPa min) | 6–7.5 |
| Elongation (% min) | 100–350 |
| Tear strength (kN/m min) | 10–15 |
| Density (g/cm³) | 1.11–1.40 |
Also exhibits good oil resistance. Base colour beige translucent to opaque — pigmentation recommended.
General-purpose sponge silicone
Closed-cell expanded silicone for seals requiring very low closure force. Ideal when the substrate is delicate or available closure force is limited.
Lightweight doors, sandwich panels, perimeter seals on pressure-sensitive materials, acoustic insulation.
| Property | Sponge (Series 15) |
|---|---|
| Certifications | FDA, CE 1935/2004, BfR |
| Density | 0.5–0.8 g/cm³ (depending on thickness) |
| Temperature range | –60 to +200 °C |
| Tensile strength (MPa min) | 3 |
| Elongation (% min) | 600 |
| Tear strength (kN/m min) | 15 |
| Tolerances | ISO 3302-1 E3 |
For EN 45545-2 certified sponge silicone, see Series 33.
Low mechanical stress silicone
Economical formulation for applications where mechanical properties are non-critical. Suitable for static seals without assembly stress, prototypes, and decorative or positioning elements.
Prototypes, short runs with moderate mechanical requirements, spacers, positioning elements.
| Property | Series 19 |
|---|---|
| Hardness range | 45–85 Shore A |
| Tensile strength (MPa min) | 6–8 |
| Elongation (% min) | 200–400 |
| Tear strength (kN/m min) | 12–16 |
| Density (g/cm³) | 1.37–1.44 |
| Temperature range | –60 to +200 °C |
| Base colour | Cream |
Higher density than other VMQ silicones due to filler formulation. Not recommended for profiles subject to repeated mechanical stress.
The default choice when there are no special chemical, thermal or regulatory requirements. Good mechanical properties, wide hardness range and competitive cost.
Prototypes, general machinery, industrial seals without specific regulatory requirements.
| Property | VMQ Peroxide (Series 2) | VMQ Platinum (Series 12) |
|---|---|---|
| Certifications | FDA, CE 1935/2004, BfR, USP Class VI | FDA, CE 1935/2004, BfR, USP Class VI, ISO 10993 |
| Hardness range | 10–90 Shore A | 20–90 Shore A |
| Tensile strength (MPa min) | 3.5–9.5 | 6–9 |
| Elongation (% min) | 125–950 | 100–1000 |
| Tear strength (kN/m min) | 10–23 | 17–30 |
| Density (g/cm³) | 1.07–1.23 | 1.11–1.20 |
| Temperature range | –60 to +200 °C | –60 to +200 °C |
| Extended range | Up to +300 °C with additive | Up to +300 °C / +315 °C with additive |
Series 12 (platinum-cured) offers higher purity and is preferred for food and medical applications. Series 2 (peroxide-cured) is more economical for general industrial use.
When the profile is subject to frequent assembly/disassembly, repeated mechanical stresses or tension during installation, tear resistance is the critical factor. These compounds double or triple the tear value of standard silicones.
Glazing profiles, inflatable seals, profiles with fine geometries (lips, fins), vibration environments.
| Property | HT Peroxide (Series 1) | HT Platinum (Series 10) | HT + Abrasion (Series 7) |
|---|---|---|---|
| Certifications | FDA, CE 1935/2004, BfR | FDA, CE 1935/2004, BfR, USP VI, ISO 10993 | FDA |
| Hardness range | 40–70 Shore A | 40–80 Shore A | 60 Shore A |
| Tensile strength (MPa min) | 6–8 | 7–9 | 6.9–8 |
| Elongation (% min) | 500–600 | 320–760 | 400 |
| Tear strength (kN/m min) | 26–40 | 33–55 | 30–35 |
| Density (g/cm³) | 1.12–1.19 | 1.12–1.24 | 1.19 |
| Temperature range | –60 to +200 °C | –60 to +200 °C | –60 to +230 °C |
Series 10 (platinum-cured) achieves up to 55 kN/m tear strength — exceptional for silicone. Series 7 adds abrasion resistance for friction environments.
Rolling stock requires profiles that comply with EN 45545-2 for fire, smoke and toxicity performance. Requirement sets R22 and R23 are the most common for gaskets and seals in vehicle interiors.
Rolling stock manufacturers, rail interior integrators, fleet maintenance.
Solid for extrusion (Series 16 — PEQ)
| Hazard levels achieved | HL1, HL2, HL3 (R22 and R23) |
| Limiting oxygen index (LOI) | 32.7 % |
| Smoke optical density (Ds max) | 84.7 |
| Toxicity index (CIT) | 0.06 |
| Hardness range | 30–85 Shore A |
| Validated colours | Black RAL 9017, Blue-black RAL 5004 |
| Tested thickness | 3 mm |
Solid for moulding (Series 16 — PMQ)
| Hazard levels achieved | HL1, HL2, HL3 (R22 and R23) |
| Limiting oxygen index (LOI) | 35.1 % |
| Smoke optical density (Ds max) | 45 |
| Toxicity index (CIT) | 0.06 |
| Hardness range | 30–85 Shore A |
| Validated colours | Black RAL 9017, Grey, Cream |
| Tested thickness | 3 mm |
Flame-retardant sponge (Series 33)
| Hazard levels achieved | HL1, HL2 (R22 and R23) |
| Limiting oxygen index (LOI) | 29 % |
| Smoke optical density (Ds max) | 62.1 |
| Toxicity index (CIT) | 0.05 |
| Validated colours | Black, Grey, Cream |
| Tested thicknesses | 3 mm and 10 mm |
Typical geometries
- Bulb seal for access doors
- Window gasket with contact lip
- Gangway profile between coaches
- Perimeter seal for interior panels
Results correspond to the thicknesses indicated. For different thicknesses, consult certification feasibility. Tests performed by external laboratory to NF EN 45545-2:2020.
Profiles in contact with food require formulations certified for the target market: FDA 21 CFR 177.2600 for USA, Regulation CE 1935/2004 for Europe, or BfR for Germany.
Food machinery manufacturers, packaging equipment, food processing, dairy and beverage industry.
| Property | General purpose (Series 2/12) | High tear (Series 10) | Sponge (Series 15) |
|---|---|---|---|
| Certifications | FDA, CE 1935/2004, BfR | FDA, CE 1935/2004, BfR, USP VI | FDA, CE 1935/2004, BfR |
| Hardness range | 10–90 Shore A | 40–80 Shore A | — |
| Tensile strength (MPa min) | 3.5–9.5 | 7–9 | 3 |
| Elongation (% min) | 125–950 | 320–760 | 600 |
| Tear strength (kN/m min) | 10–23 | 33–55 | 15 |
| Density (g/cm³) | 1.07–1.23 | 1.12–1.24 | 0.5–0.8 |
| Temperature range | –60/+200 °C | –60/+200 °C | –60/+200 °C |
Use of certain pigments may invalidate food-contact certification. Consult compatibility before specifying colour.
Demonstrated biocompatibility per USP Class VI or ISO 10993, manufactured in ISO 8 cleanroom validated to ISO 14644. From external devices to compounds validated for short-term implantation.
Medical device manufacturers, laboratories, pharmaceuticals, diagnostic equipment.
Medical devices (Series 12)
| Certifications | USP Class VI, ISO 10993, FDA, CE 1935/2004 |
| Manufacturing | ISO 8 cleanroom |
| Hardness range | 20–90 Shore A |
| Tensile strength (MPa min) | 6–9 |
| Elongation (% min) | 100–1000 |
| Tear strength (kN/m min) | 17–30 |
| Temperature range | –60 to +200 °C |
Short-term implantable <29 days (Series 17 — NUSIL grade)
| Certifications | USP Class VI, ISO 10993 |
| Manufacturing | ISO 8 cleanroom |
| Hardness range | 25–80 Shore A |
| Tensile strength (MPa min) | Up to 10.8 |
| Elongation (% min) | Up to 1200 (exceptional) |
| Tear strength (kN/m min) | Up to 46.7 (exceptional) |
| Temperature range | –60 to +200 °C |
| Options | Radiopaque additive available |
Peristaltic pumps (Series 30)
| Certifications | FDA, USP Class VI, ISO 10993 |
| Manufacturing | ISO 8 cleanroom |
| Hardness range | 50–65 Shore A |
| Tensile strength (MPa min) | 8–8.8 |
| Elongation (% min) | 400–500 |
| Tear strength (kN/m min) | 17–39 |
| Temperature range | –60 to +180 °C |
Suction tubing manufactured with EQ1260T formulation is validated for integration into CE-marked medical devices.
When operating temperature exceeds the +200 °C limit of standard silicones. Formulations with thermal stability up to +300 °C continuous and +315 °C peak.
Industrial ovens, sterilisation equipment, vulcanisation machinery, high-temperature autoclaves.
| Property | Maximum T (Series 9) | HT + High T (Series 20) | HT + Abrasion (Series 7) |
|---|---|---|---|
| Certifications | FDA | FDA | FDA |
| Continuous temperature | –60 to +300 °C | –60 to +270 °C | –60 to +230 °C |
| Peak temperature | +315 °C | — | — |
| Hardness range | 40–70 Shore A | 45–70 Shore A | 60 Shore A |
| Tensile strength (MPa min) | 6–8 | 7–8 | 6.9–8 |
| Elongation (% min) | 300–400 | 400–550 | 400 |
| Tear strength (kN/m min) | 12–17 | 30–36 | 30–35 |
| Density (g/cm³) | 1.11–1.20 | 1.12–1.20 | 1.19 |
Series 20 combines high temperature with high tear strength — ideal when the profile operates hot and experiences simultaneous mechanical stress.
Standard silicones maintain flexibility down to –60 °C. Below this, phenyl silicone (PVMQ) is required, which retains elasticity to –110 °C thanks to phenyl groups that prevent crystallisation.
Biological cryopreservation, liquid nitrogen containers, climatic chambers, aerospace industry, low-temperature research.
| Property | PVMQ (Series 5) |
|---|---|
| Temperature range | –110 to +200 °C (+215 °C with additive) |
| Hardness | 50 Shore A |
| Tensile strength (MPa min) | 8 |
| Elongation (% min) | 550 |
| Tear strength (kN/m min) | 28 |
| Density (g/cm³) | 1.21 |
Excellent performance under vibration at low temperature. Good tear resistance.
When the profile will be in contact with hydrocarbons, mineral oils or organic solvents, standard silicone (VMQ) swells and degrades. Fluorosilicone (FVMQ) offers far superior chemical resistance due to trifluoropropyl groups.
Aerospace (fuel tanks), hydraulic systems, lubrication circuits, engines and transmissions.
| Property | FVMQ (Series 13) |
|---|---|
| Temperature range | –60 to +170 °C (up to +220 °C with additive) |
| Hardness range | 40–70 Shore A |
| Tensile strength (MPa min) | 6–7 |
| Elongation (% min) | 160–400 |
| Tear strength (kN/m min) | 10–21 |
| Density (g/cm³) | 1.40–1.46 |
Chemical resistance
- Aviation fuels (Jet A, JP-8)
- Mineral and hydraulic oils
- Aromatic solvents (toluene, xylene)
- Brake fluids
- Engine oils
FVMQ density (1.40–1.46 g/cm³) is significantly higher than standard VMQ (1.10–1.20 g/cm³). Consider in weight calculations for aerospace applications.
Carbon-filled formulation for electrostatic discharge (ESD) dissipation or electromagnetic interference (EMI) shielding. Controlled volume resistivity.
Electronics, ESD-sensitive equipment, ATEX environments, cabling and connector assemblies.
| Property | Conductive (Series 11) |
|---|---|
| Volume resistivity | 4–12 Ω·cm |
| Temperature range | –50 to +210 °C |
| Hardness range | 50–70 Shore A |
| Tensile strength (MPa min) | 5 |
| Elongation (% min) | 100–250 |
| Tear strength (kN/m min) | 5–10 |
| Density (g/cm³) | 1.11–1.16 |
| Colour | Black only |
Available in black only due to conductive filler. Mechanical properties are lower than standard silicones. Extrusion possible subject to feasibility study.
Repeated cycles of pressurised saturated steam degrade standard silicones: loss of elasticity, hardening, cracking. Optimised formulations maintain properties after hundreds of cycles.
Hospital and industrial autoclaves, sterilisation, dairy and brewing industry, CIP cleaning.
| Property | Steam + oils (Series 14) | Steam + aromatics (Series 22) |
|---|---|---|
| Certifications | FDA, BfR | FDA |
| Temperature range | –60 to +200 °C | –60 to +200 °C |
| Hardness range | 60–70 Shore A | 40–80 Shore A |
| Tensile strength (MPa min) | 8 | 6.4–7.9 |
| Elongation (% min) | 300–360 | 130–390 |
| Tear strength (kN/m min) | 15–18 | 9.5–14 |
| Density (g/cm³) | 1.16–1.20 | 1.11–1.36 |
Series 14 offers good compression set retention after autoclave cycles and resistance to cooling fluids. Series 22 is formulated for contact with aromatic oils at low concentrations.
In applications where the gasket is permanently compressed (flanges, bolted covers), compression set determines seal service life. This formulation minimises permanent deformation.
O-rings for permanent flanges, bolted cover seals, damping systems, any gasket compressed for years.
| Property | Low CS (Series 4) |
|---|---|
| Certifications | FDA |
| Compression set (70h / 150 °C) | 11–18 % (very low) |
| Temperature range | –60 to +200 °C |
| Hardness range | 40–80 Shore A (moulding) / 40–75 Shore A (extrusion) |
| Tensile strength (MPa min) | 6–7.5 |
| Elongation (% min) | 100–350 |
| Tear strength (kN/m min) | 10–15 |
| Density (g/cm³) | 1.11–1.40 |
Also exhibits good oil resistance. Base colour beige translucent to opaque — pigmentation recommended.
Closed-cell expanded silicone for seals requiring very low closure force. Ideal when the substrate is delicate or available closure force is limited.
Lightweight doors, sandwich panels, perimeter seals on pressure-sensitive materials, acoustic insulation.
| Property | Sponge (Series 15) |
|---|---|
| Certifications | FDA, CE 1935/2004, BfR |
| Density | 0.5–0.8 g/cm³ (depending on thickness) |
| Temperature range | –60 to +200 °C |
| Tensile strength (MPa min) | 3 |
| Elongation (% min) | 600 |
| Tear strength (kN/m min) | 15 |
| Tolerances | ISO 3302-1 E3 |
For EN 45545-2 certified sponge silicone, see Series 33.
Economical formulation for applications where mechanical properties are non-critical. Suitable for static seals without assembly stress, prototypes, and decorative or positioning elements.
Prototypes, short runs with moderate mechanical requirements, spacers, positioning elements.
| Property | Series 19 |
|---|---|
| Hardness range | 45–85 Shore A |
| Tensile strength (MPa min) | 6–8 |
| Elongation (% min) | 200–400 |
| Tear strength (kN/m min) | 12–16 |
| Density (g/cm³) | 1.37–1.44 |
| Temperature range | –60 to +200 °C |
| Base colour | Cream |
Higher density than other VMQ silicones due to filler formulation. Not recommended for profiles subject to repeated mechanical stress.
From drawing to validated profile
Whether you have a detailed CAD drawing or just a hand sketch, the process is the same. The key is to properly define the operating conditions.
Application sectors
Rail
EN 45545-2 compliant profiles for door, window, gangway and interior panel sealing.
Medical
USP Class VI and ISO 10993 biocompatible profiles manufactured in ISO 8 cleanroom.
Food & Beverage
FDA, CE 1935/2004 and BfR compliant profiles for direct food contact.
Industrial
Seals for ovens, autoclaves, process machinery and general applications.
Related products
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Technical tubing for fluid conveyance, peristaltic pumps and medical applications.
Silicone Gaskets
O-rings, flat gaskets, vulcanised and special gaskets for all sealing requirements.
Silicone Moulded Parts
LSR injection and HCR compression moulded parts to drawing.
FKM / Viton
Fluoroelastomers for extreme chemical and thermal resistance.
Need a custom silicone profile?
Send us your drawing or sample together with operating conditions: temperature, chemical environment, required certifications. Our technical team will advise on the most suitable formulation and provide a no-obligation quotation.
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