ES EN FR PT
Contact
Home
Perfiles a Medida Custom profiles Perfiles Espuma Foam profiles Perfiles Cuadrados Square profiles Perfiles Rectangulares Rectangular profiles
Tubos Industriales Industrial tubing Tubos Médicos Medical tubing Tubos Alimentarios Food-grade tubing Tubos Peristálticos Peristaltic tubing Tubos Alta Temperatura High-temp tubing Tubos Reforzados Reinforced tubing Tubos Especiales Special tubing Manguitos Automotive hoses
Cordón Compacto Solid cord Cordón Espuma Foam cord
Juntas Planas Flat gaskets Juntas Tóricas O-rings Juntas Hinchables TIXAN'AIR inflatable Vulcanizadas Aro Vulcanised ring Vulcanizadas Marco Vulcanised frame
Compresión Compression Inyección HCR HCR injection Sobremoldeo Overmoulding Inyección LSR LSR injection LSR Médico Medical LSR LSR Alimentario Food-grade LSR LSR Industrial Industrial LSR
Láminas Calandradas Calendered sheets Placas Moldeadas Moulded slabs Lámina Conductora ESD conductive sheet Lámina Metal-Detectable Metal-detectable Lámina Alimentaria FDA food-grade Lámina Esponjosa Sponge Lámina Ignífuga EN 45545-2 Fire-retardant EN 45545-2 Lámina Ultrafina Diafragmas Ultra-thin diaphragms
Lámina Silicona Conductora ESD ESD conductive sheet
Perfiles Extrusión Extruded profiles Piezas Moldeo Moulded parts Planchas Slabs Lámina EPDM EPDM sheet Lámina Neopreno Neoprene sheet
Juntas planas FKM / Viton™ B FKM / Viton™ B flat gaskets Lámina Viton® Esponjosa Sponge Viton® sheet
Membranas VAC-SIL® VAC-SIL® membranes
Fuelles y Juntas de Expansión Bellows and expansion gaskets
Heating elements
Extrusión de silicona Extrusion Moldeo · compresión · inyección LSR y HCR Moulding Formulaciones de silicona Compounds Diseño y utillajes Design and tooling Salas blancas ISO 8 ISO 8 cleanrooms
Ferroviario Railway Aeronáutico Aerospace Médico Medical Farmacéutico Pharmaceutical Agroalimentario Food and beverage Nuclear Nuclear Laboratorio Laboratory Electrónica Electronics Iluminación Lighting Industria General General industry
About us Our story, mission and values
How we work Certified quality processes
Location Facilities in Barcelona, Spain
Certifications ISO 9001 and ISO 13485 certificates
Tubo de silicona alimentario translúcido 60 Shore A: especificación técnica y criterios de selección
Materials technology Inflatable silicone gaskets · selection, expansion and installation
Categories Materials technology 16 Case studies 1 Standards and certifications 4 Industry trends 1 Technical guides 3
See all articles →
🇪🇸 ES 🇬🇧 EN 🇫🇷 FR 🇵🇹 PT
Sealing and insulation

Sponge silicone sheet

VMQ sheet with a closed-cell, non-interconnected structure that blocks water, air and dust. It combines the thermal and chemical resistance of solid silicone with the compressibility, thermal insulation and light weight of a cellular material. It seals with very low closing forces, absorbs surface irregularities and recovers its thickness after thousands of cycles.

Contacte con nosotrosVer especificaciones técnicas
StructureClosed cells · non-interconnected
Density200 to 500 kg/m³
Thicknesses1.5 to 25 mm
Temperature–60 °C to +200 °C

Water absorption < 3 % (ASTM D1056) · UV, ozone and weathering resistance · high-temperature adhesive backing option · 6 grades available: standard, FDA food-grade, fire-retardant EN 45545-2, metal-detectable, high recovery and UL 94 V-0.

The product

Closed cells that compress 50–70 % with low closing force and recover their original thickness.

When a seal needs to close with little force — oven door, equipment lid, access panel — solid silicone requires high tightening and, if the surface has irregularities or wide tolerances, does not adapt. Closed-cell sponge silicone solves that case: it compresses to 50–70 % of its thickness under very low forces and absorbs surface variations that solid silicone cannot cover.

Industrial standard grade · medium density · general sealing
Food-grade Series 15 · platinum catalysis · FDA
Fire-retardant Series 33 grade · EN 45545-2 HL1/HL2 · railway
Metal-detectable grade · FDA ferrite · detection < 1 mm
High recovery grade · low compression set · frequent cycling

Specifications

Product
Cellular VMQ sheet · non-interconnected closed cells · post-cured
Density
200 to 500 kg/m³ depending on grade · soft 200-280 · medium 280-360 · firm 360-500
Thicknesses
1.5 to 25 mm · other sizes on request
Roll width
1,000 mm standard · others on request
Compressibility
50 to 70 % of thickness under low closing forces
Recommended compression (design)
25 to 50 % of initial thickness for effective sealing
Water absorption
< 3 % (ASTM D1056)
Service temperature
–60 °C to +200 °C continuous
Environmental resistance
UV · ozone · weathering · prolonged solar radiation
Standard colours
Red · white · grey · blue · black RAL 9017 · cream (depending on grade)
Tolerances
Thickness ±10 % · width ±0.5 % · density ±15 %
Industrial standard grade
Medium density · general industrial sealing · no specific certification
Food-grade
Series 15 · platinum catalysis · FDA 21 CFR 177.2600 · CE 1935/2004 · BfR
Fire-retardant railway grade
Series 33 · platinum catalysis · EN 45545-2 R22 and R23 at HL1 and HL2 (does not reach HL3)
Metal-detectable grade
VMQ with FDA metal ferrite · detection < 1 mm · blue colour
High recovery grade
Low compression set · frequent open/close cycles · high-temperature service
UL 94 V-0 grade
Self-extinguishing · electrical enclosures · industrial luminaires
Adhesive backing
High-temperature adhesive option (resistant to +200 °C) on request
Management system
ISO 9001:2015 · ISO 13485:2016 (regulated grades)
Applicable standards
ASTM D1056 · ASTM D6576 · REACH (1907/2006) · RoHS (2015/863)
Added services
Roll · CNC with oscillating blade · die-cutting · perimeter strip · adhesive backing (Spain)
Use typologies

Sponge catalogue: industrial standard, regulated food-grade and railway / lighting

Industrial standard

  • 01Industrial oven door gasket
  • 02IP65 electrical enclosure sealing
  • 03HVAC sealing and thermal insulation

Regulated food-grade

  • 01Cold room door gasket
  • 02Food hopper lid
  • 03Sponge with metal detector

Railway, lighting and autoclave

  • 01Railway carriage door gasket
  • 02UL94 industrial luminaire sealing
  • 03High-recovery autoclave lid
Materials

Catalogue cellular series available in sponge sheet format

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
Design rule · density and thickness

Sponge is designed by density, thickness and available closing force

Design rule: the sponge must compress between 25 % and 50 % of its initial thickness to seal effectively. If the closing force is low — manual closure, hinges, clips — choose a soft density (200-280 kg/m³) and greater thickness. If the surface is machined and the force is controlled, medium density (280-360) or firm (360-500) with smaller thickness.

Soft density: maximum compressibility, fast recovery after decompression, best for compressible seals under low force. Medium density: balance between compressibility and resistance to permanent deformation. Firm density: maximum resistance to crushing, ideal for anti-vibration floors or high-load damping.

Each batch is delivered with a certificate of conformity and roll traceability. For regulated grades (food-grade S15, metal-detectable, fire-retardant S33) specific documentation is included: FDA, white-listed ferrite, EN 45545-2 R22/R23.

Check density and thickness
Services and processes

Services and processes related to sponge sheet

Longitudinal slitting Service Longitudinal slitting Learn more → ISO 8 cleanroom Process ISO 8 cleanroom Learn more → Catalogue formulations Process Catalogue formulations Learn more → Design and tooling Process Design and tooling Learn more →
Catalogue

Products related to sponge sheet

Food-grade sheet Variant Food-grade sheet Learn more → Metal-detectable sheet Variant Metal-detectable sheet Learn more → Fire-retardant EN 45545-2 sheet Variant Fire-retardant EN 45545-2 sheet Learn more → Die-cut flat gaskets Product Die-cut flat gaskets Learn more →
Do you need sponge silicone for your sealing?

Tell us the application (equipment, service temperature, available closing force, opening frequency), the required regulation (food-grade, fire-retardant EN 45545-2, UL 94, IP), the dimensions (thickness, length, width or gasket drawing) and the quantity. We will confirm the right grade and density, die-cut feasibility and quote with the full technical documentation.

Email
info@prosilicones64.com
Form
Request a quote