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Expanded extrusion

Silicone sponge profiles

Extruded profiles with closed-cell structure: low density, high compressibility and elastic recovery for sealing and tolerance take-up. Formulations compliant with FDA, CE 1935/2004, EN 45545-2, UL94, USP Class VI and ISO 10993.

Contact usView technical specifications
Density0.5–0.8 g/cm³
ToleranceISO 3302-1 · E3
Temperature–60 °C to +200 °C
CertificationsFDA · EN 45545-2

Ranges depending on density and formulation. Check the specification for each application.

The product

The closed-cell structure defines the behaviour of the profile.

The profiles are manufactured by expanded extrusion: cellular VMQ silicone forms a closed cell that delivers light weight, thermal insulation and elastic recovery. Densities from 0.25 to 0.6 g/cm³, with food, medical, flame-retardant, antistatic or high-temperature formulations.

Silicone sponge profile
Silicone sponge profile
Silicone sponge profile
Silicone sponge profile
Silicone sponge profile

Technical specifications

Typical values according to series datasheets and the standards indicated. They may vary depending on density, hardness and formulation; final validation rests with the customer.

PropertyTypical valuesStandard
Compression set≤ 35 %ISO 815-1
Elongation at break200 – 400 %ISO 37
Density0.16 – 0.53 g/cm³ISO 845
Service temperature–60 … +200 °C—
TolerancesExtrusion E2–E3ISO 3302-1
Sector approvals (on request)EN 45545-2 · FDA · CE 1935/2004 · BfR · RoHS · REACH—
Construction

Composition and section geometry define each profile

Composition

  • 01Solid
  • 02Sponge
  • 03Co-extruded
  • 04With insert

Geometry

  • 01D type
  • 02P type
  • 03U / C type
  • 04T type
  • 05E type
  • 06Single lip
  • 07Tubular
  • 08Solid
Materials

Certified cellular silicone formulations

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. Its cellular structure allows lightweight, flexible profiles to be produced, ideal for ensuring sealing on irregular surfaces. Platinum curing gives it higher purity and better mechanical properties compared with standard peroxide foams.

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)

Series 33 – Platinum-cure cellular silicone (foam) fire-retardant (EN 45545-2)

Series 33 is a cellular (foam) silicone blend catalysed with platinum, designed for processing by extrusion. It is characterised by good sealing performance combined with advanced safety properties: good fire resistance and good self-extinguishing behaviour. It complies with the requirements of EN 45545-2 (R22 and R23, HL1 and HL2 levels), making it ideal for lightweight sealing profiles in transport and demanding applications.

Platinum-catalysed cellular silicone, processable by extrusion. It offers good sealing, excellent fire behaviour and self-extinguishing properties, and a wide range of available colours. Specially developed for railway applications and thermal sealing with compliance to EN 45545-2 R22/R23 (HL1–HL2).

HardnessN/A (Cellular)
Temperature range-60 °C / 200 °C
Density (g/cm³)0.50 – 0.80
Catalysis typePlatinum
Processing methodExtrusion
Base colourWhite / Grey / Black / Oxide red (to order)
Available coloursVarious RAL colours available on request

Applications

  • Sealing gaskets, tubing, profiles in cord, square, rectangular or trapezoidal cross-sections with fire resistance and good sealing performance.

Certifications and technical standards

  • EN 45545-2:2020 R22/R23 HL1–HL2
  • RoHS compliant
  • REACH compliant
  • ISO 3302 – extruded products E3
  • cut lengths L3
Extrusion in ISO 8 cleanroom

The manufacturing environment is also part of the profile specification

The food and medical cellular silicone formulations are extruded in an ISO 8 certified cleanroom, with control of particles, temperature and humidity, full batch-by-batch traceability and recording of process parameters to feed the customer's control file.

Discover the ISO 8 Cleanroom
Services and processes

Processes that go with sponge extrusion

Cutting to length Service Cutting to length Learn more → Vulcanised gaskets Service Vulcanised gaskets Learn more → Extrusion Process Extrusion Learn more → Design and tooling Process Design and tooling Learn more →
Catalogue

Products related to the sponge profile

Square and rectangular profiles Product Square and rectangular profiles Learn more → Silicone sponge cords Product Silicone sponge cords Learn more → Solid silicone cords Product Solid silicone cords Learn more → Custom silicone profiles Product Custom silicone profiles Learn more →
Need silicone sponge profiles?

Let us know the sealing, compression and temperature conditions of your application. We will advise on the most suitable density and formulation and prepare a quotation with no obligation.

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