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Piezas técnicas por compresión · componentes HCR con geometría compleja y durezas 40-85 Shore A
Compression moulding

Silicone parts by compression moulding

We manufacture silicone parts by compression moulding: a preform of VMQ compound is placed directly into the open mould and vulcanises under heat and pressure. The right process for large parts, high wall thicknesses, open geometries and pre-series with reduced tooling cost. Platinum or peroxide cure depending on the application.

Contact usView technical specifications
CatalysisPlatinum or peroxide
Hardness10–90 Shore A
TolerancesISO 3302-1 · class M2
CertificationsISO 9001 · ISO 13485 · USP VI · FDA · EN 45545-2

Compatible with solid and cellular VMQ moulded in the same process. Sterilisable by autoclave, steam or gamma radiation depending on the formulation.

The product

Compound preform in the open mould, vulcanisation under heat and pressure. Reduced tooling cost and flexibility in geometry.

The operator places the VMQ compound preform, weighed according to the part geometry, into the mould cavity. The press closes and holds pressure and temperature during the vulcanisation time set for each formulation. Post-curing in an oven (4 h at 200 °C) is applied on peroxide-cured series when the application requires the removal of volatile by-products; platinum-cured grades cure without post-curing.

Pieza de silicona por moldeo por compresión
Pieza de silicona por moldeo por compresión
Pieza de silicona por moldeo por compresión
Pieza de silicona por moldeo por compresión
Pieza de silicona por moldeo por compresión

Specifications

Process
Compression moulding · preform in mould · vulcanisation under heat and pressure
Capacity
Dedicated workshop · custom mould · large parts and high thicknesses
Hardness
10 to 90 Shore A (full range in series 02 and 12)
Tensile strength
Standard series: 6 to 10 MPa · series 02 from 3.5 MPa in soft grades (ISO 37)
Elongation at break
300 to 700 % · up to 1,000 % in soft formulations (ISO 37)
Tear strength
Standard series: 15 to 30 kN/m · implantable series 17 up to 46.7 kN/m (ISO 34-1)
Compression set (CS)
Standard series: ≤ 35 % · series 04 ≤ 25 % at 22 h / 175 °C (ISO 815)
Density
VMQ series: 1.07 to 1.23 g/cm³ · FVMQ series 13: 1.40 to 1.46 g/cm³ · cellular series 15: 0.40 to 0.80 g/cm³ (ISO 2781)
Service temperature
–60 °C to +200 °C continuous · up to +300 °C in heat-resistant series
Tolerances
ISO 3302-1 class M2 · class M1 on critical parts
Management system
ISO 9001:2015 · ISO 13485:2016
Production environments
Controlled industrial workshop
Biocompatibility
USP Class VI · ISO 10993 (medical grade)
Food contact
FDA 21 CFR 177.2600 · CE 1935/2004 · BfR XV (food grade)
Sector-specific
EN 45545-2 railway · UL94 V-0 flame retardant
Sterilisation
Autoclave · steam · gamma radiation · ethylene oxide
Restricted substances
REACH (1907/2006) · RoHS (2015/863)
Typologies

Compression moulding catalogue: large parts, special closures and prototypes

Large parts and thick sections

  • 01Large-format diaphragms
  • 02Protective bellows
  • 03Pressure and damping plates

Insulation and special closures

  • 01Manhole gaskets
  • 02Large-format electrical insulators
  • 03Protective covers

Prototypes and pre-series

  • 01Functional prototypes
  • 02Validation pre-series
  • 03Tooling and assembly parts
Materials

Catalogue series available by compression moulding

Series 2 – Peroxide-cure silicone for general and food-grade use

Series 2 is a peroxide-cured silicone compound designed for versatile processing by extrusion and moulding.

Shore A hardness10 – 90
Temperature range-60 °C / 200 °C
Peak temperature315 °C
Density (g/cm³)1.07 – 1.23
Tensile strength (MPa)3.5 – 9.5
Elongation at break (%)125 – 950
Tear strength (kN/m)10.0 – 23.0
Curing systemPeroxide
Processing methodExtrusion and Moulding
Base colourNatural / Transparent
Available coloursRAL colours on request

Applications

  • Tubes (Øint 0.5–145 mm), profiles (cords, square, rectangular), moulded parts and varied industrial applications.

Certifications and technical standards

  • FDA 21 CFR 177.2600
  • BfR IX and XV
  • CE 1935/2004 (Food contact)
  • ISO 10993 (medical grade depending on formulation)
  • USP Class VI
  • RoHS compliant
  • REACH compliant
  • NF ISO 7619-1
  • NF ISO 37
  • NF ISO 34-1
  • NF ISO 2781
  • ISO 3302 (M2/E1/L2)

Series 4 – Peroxide-cure silicone with low compression set and oil resistance

Series 4 is a peroxide-cured VMQ silicone formulation developed specifically for applications requiring excellent elastic recovery after compression (low compression set) and good resistance to oil contact.

Shore A hardness40 – 80
Temperature range-60 °C / 200 °C
Density (g/cm³)1.11 – 1.40
Tensile strength (MPa)6.0 – 7.5
Elongation at break (%)100 – 350
Tear strength (kN/m)10.0 – 15.0
Curing systemPeroxide
Processing methodExtrusion and Moulding
Base colourTranslucent beige / Opaque beige
Available coloursRAL colours on request

Applications

  • Moulded parts or profiles subjected to repeated stress, O-rings, damping systems.

Certifications and technical standards

  • FDA 21 CFR §177.2600
  • RoHS compliant
  • REACH compliant
  • NF ISO 7619-1
  • NF ISO 37
  • NF ISO 34-1
  • NF ISO 2781
  • NF ISO 815
  • ISO 3302 (M2/E1/L2)

Series 12 – Platinum-cure silicone with strong mechanical properties and versatility

Series 12 is a platinum-cured silicone compound processable by extrusion and moulding, recognised for its strong mechanical properties.

Shore A hardness20 – 90
Temperature range-60 °C / 200 °C
Peak temperature315 °C
Density (g/cm³)1.11 – 1.20
Tensile strength (MPa)6.0 – 9.0
Elongation at break (%)100 – 1000
Tear strength (kN/m)17.0 – 30.0
Curing systemPlatinum
Processing methodExtrusion and Moulding
Base colourNatural / Transparent
Available coloursRAL colours on request

Applications

  • Tubes (Øint 0.5–145 mm), profiles (cords, square, rectangular), moulded parts and industrial or medical applications.

Certifications and technical standards

  • FDA 21 CFR §177.2600
  • BfR IX and XV
  • CE 1935/2004
  • ISO 10993 (depending on formulation)
  • USP Class VI
  • RoHS compliant
  • REACH compliant
  • NF ISO 7619-1
  • NF ISO 37
  • NF ISO 34-1
  • NF ISO 2781
  • ISO 3302 (M2/E1/L2)

Series 10 – High-tear platinum-cure silicone for medical and food-grade applications

Series 10 is a platinum-catalysed silicone blend designed to deliver exceptionally high tear strength.

Shore A hardness40 – 80
Temperature range-60 °C / 200 °C
Density (g/cm³)1.12 – 1.24
Tensile strength (MPa)7.0 – 9.0
Elongation at break (%)320 – 760
Tear strength (kN/m)33.0 – 55.0
Catalysis typePlatinum
Processing methodExtrusion and moulding
Base colourNatural / Transparent
Available coloursRAL colours on request

Applications

  • Inflatable seals, tubes, profiles and moulded parts for industrial, medical and food-contact applications.

Certifications and technical standards

  • FDA 21 CFR §177.2600
  • BfR IX and XV
  • CE 1935/2004
  • ISO 10993 (depending on formulation)
  • USP Class VI
  • RoHS compliant
  • REACH compliant
  • NF ISO 7619-1
  • NF ISO 37
  • NF ISO 34-1
  • NF ISO 2781
  • ISO 3302 (M2/E1/L2)

Series 14 – Enhanced peroxide silicone for steam and fluid resistance

Series 14 is a peroxide-cured silicone compound formulated specifically to improve resistance to water steam, coolant fluids and oils.

Shore A hardness60 – 70
Temperature range-60 °C / 200 °C
Density (g/cm³)1.16 – 1.20
Tensile strength (MPa)8.0 – 8.0
Elongation at break (%)300 – 360
Tear strength (kN/m)15.0 – 18.0
Curing systemPeroxide
Processing methodExtrusion and Moulding
Base colourNatural / RAL colours
Available coloursRAL colours on request

Applications

  • Autoclave gaskets, parts in contact with steam or coolants.

Certifications and technical standards

  • FDA 21 CFR §177.2600
  • BfR IX and XV
  • RoHS compliant
  • REACH compliant
  • NF ISO 7619-1
  • NF ISO 37
  • NF ISO 34-1
  • NF ISO 2781
  • ISO 3302 (M2/E1/L2)

Series 22 – Peroxide silicone resistant to steam and aromatic oils

Series 22 is a peroxide-cured silicone compound processable by extrusion and moulding.

Shore A hardness40 – 80
Temperature range-60 °C / 200 °C
Density (g/cm³)1.11 – 1.36
Tensile strength (MPa)6.4 – 7.9
Elongation at break (%)130 – 390
Tear strength (kN/m)9.5 – 14.0
Curing systemPeroxide
Processing methodExtrusion and Moulding
Base colourRAL1013 Translucent

Applications

  • Autoclave gaskets, moulded parts, O-rings.

Certifications and technical standards

  • FDA 21 CFR §177.2600
  • RoHS compliant
  • REACH compliant

Series 9 – Peroxide-cure silicone with excellent thermal resistance (300°C)

Series 9 is a peroxide-cured silicone compound formulated specifically to deliver excellent thermal stability.

Shore A hardness40 – 68
Temperature range-60 °C / 300 °C
Peak temperature315 °C
Density (g/cm³)1.11 – 1.20
Tensile strength (MPa)6.0 – 8.0
Elongation at break (%)300 – 400
Tear strength (kN/m)12.0 – 17.0
Curing systemPeroxide
Processing methodExtrusion and Moulding
Base colourNatural / Transparent
Available coloursRAL colours on request

Applications

  • Profiles, industrial oven equipment, moulded parts and extreme thermal applications.

Certifications and technical standards

  • FDA 21 CFR §177.2600
  • RoHS compliant
  • REACH compliant
  • NF ISO 7619-1
  • NF ISO 37
  • NF ISO 34-1
  • NF ISO 2781
  • ISO 3302 (M2/E1/L2)

Series 16 – Fire-retardant self-extinguishing peroxide silicone (EN 45545-2) PMQ

Series 16 is a peroxide-catalysed silicone blend, processable by extrusion and moulding, designed specifically to provide excellent fire resistance and self-extinguishing properties.

Shore A hardness30 – 85
Temperature range-60 °C / 200 °C
Density (g/cm³)1.09 – 1.26
Tensile strength (MPa)5.0 – 9.0
Elongation at break (%)380 – 850
Tear strength (kN/m)17.0 – 25.0
Oxygen index (LOI)32.7
Smoke density (Ds max)84.7
ITC / Hazard Level0.06
Railway hazard levelHL1, HL2, HL3
Catalysis typePeroxide
Processing methodExtrusion and moulding
Base colourBlack / Blue-black (RAL 9017 / RAL 5004)
Available coloursBlack (RAL 9017), Blue-black (RAL 5004)

Applications

  • Railway applications (seals, profiles, gaskets, thermal protections, insulation panels).

Certifications and technical standards

  • EN 45545-2 R22/R23 HL1-HL2-HL3
  • RoHS compliant
  • REACH compliant
  • NF EN 45545-2:2020
  • EN ISO 4589-2 (O₂ Index 32.7%)
  • EN ISO 5659-2 (Ds max 84.7)
  • EN 17084 (ITC PNL 0.06)

Series 17 – Platinum-cure short-term implantable silicone (< 29 days)

Series 17 is a platinum-catalysed silicone blend, designed specifically for medical applications requiring short-term implantation (less than 29 days according to NUSIL data).

Shore A hardness25 – 80
Temperature range-60 °C / 200 °C
Density (g/cm³)1.11 – 1.20
Tensile strength (MPa)7.9 – 10.8
Elongation at break (%)700 – 1200
Tear strength (kN/m)33.5 – 46.7
Catalysis typePlatinum
Processing methodExtrusion and moulding
Base colourTranslucent

Applications

  • Tubing, tubing with radiopaque lines, profiles, moulded parts and O-rings for medical applications.

Certifications and technical standards

  • USP Class VI
  • ISO 10993 (depending on formulation)
  • RoHS compliant
  • REACH compliant

Series 13 – Fluorosilicone (FVMQ) with high resistance to oils and solvents

Series 13 is a fluorosilicone blend (FVMQ base) catalysed with peroxide, designed specifically to provide exceptional resistance to mineral oils, fuels and organic solvents.

Shore A hardness40 – 70
Temperature range-60 °C / 170 °C
Density (g/cm³)1.40 – 1.46
Tensile strength (MPa)6.0 – 7.0
Elongation at break (%)160 – 400
Tear strength (kN/m)10.0 – 21.0
Catalysis typePeroxide
Processing methodExtrusion and moulding
Base colourNatural / Transparent
Available coloursRAL colours on request

Applications

  • Profiles, moulded parts and special components for environments with oils or solvents.

Certifications and technical standards

  • RoHS compliant
  • REACH compliant
  • NF ISO 7619-1
  • NF ISO 37
  • NF ISO 34-1
  • NF ISO 2781
  • ISO 3302 (M2/E1/L2)

Series 15 – Platinum-cure cellular silicone (foam) for extrusion

Series 15 is a cellular (foam) silicone formulation catalysed with platinum, designed specifically for the extrusion process.

HardnessN/A (Cellular material)
Temperature range-60 °C / 200 °C
Density (g/cm³)0.50 – 0.80
Tensile strength (MPa)3.0 – 3.0
Elongation at break (%)600 – 600
Tear strength (kN/m)15.0 – 15.0
Catalysis typePlatinum
Processing methodExtrusion
Base colourVarious RAL colours
Available coloursVarious RAL colours available on request

Applications

  • Sealing profiles, gaskets, cellular tubing.

Certifications and technical standards

  • FDA 21 CFR §177.2600
  • BfR IX and XV
  • CE 1935/2004 (depending on formulation)
  • RoHS compliant
  • REACH compliant
  • NF ISO 37
  • NF ISO 34-1
  • NF ISO 2781
  • ISO 3302 (E1/L2)
Prensa de compresión con molde caliente abierto
Large parts and prototypes

Reduced tooling cost, parts that injection cannot make and design validation in pre-series

A compression mould is structurally simpler than an injection mould — no manifold, no runners, no automatic ejection — which reduces the initial investment. For pre-series of 5 to 500 units, functional prototypes or one-off parts, the tooling saving offsets the lower output per part.

The compression press accepts moulds with a larger projected surface for the same tonnage. Diaphragms, bellows, damping plates, manhole gaskets and thick-walled parts that exceed the capacity of injection presses are produced here without splitting.

Compression pre-series validate real tolerances, shrinkage and assembly before committing to a definitive injection mould. Same compound, same raw-material supplier, same catalogue series: the move to injection preserves the properties of the validated material.

Explore our processes
Services and processes

Moulding processes of the group

HCR injection Process HCR injection Learn more → LSR injection Process LSR injection Learn more → Plastic-silicone overmoulding Process Plastic-silicone overmoulding Learn more → Design and tooling Process Design and tooling Learn more →
Catalogue

Related products for compression moulding

HCR injection-moulded parts Product HCR injection-moulded parts Learn more → LSR injection-moulded parts Product LSR injection-moulded parts Learn more → Plastic-silicone overmoulding Product Plastic-silicone overmoulding Learn more → Vulcanised silicone gaskets Product Vulcanised silicone gaskets Learn more →
Need parts made by compression moulding?

Send us the drawing (STEP, IGES or PDF), the target Shore A hardness, the applicable series or end-use sector, the required standards (FDA, USP VI, ISO 10993, EN 45545-2, UL94…) and the estimated volume. We will confirm mould feasibility and provide a quote with the tooling lead time.

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