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Foreign body detection

Metal-detectable silicone sheet

VMQ sheet with metal ferrite particles homogeneously distributed throughout the mass. If a fragment of gasket or seal breaks off during production, the line's metal detector identifies it automatically, including particles smaller than 1 mm. The ferrite is white-listed by the FDA and is inert: it does not affect food compliance or the mechanical and thermal properties of the silicone.

Contacte con nosotrosVer especificaciones técnicas
DetectionFragments < 1 mm
Hardness60 Shore A (solid)
Thicknesses0.5 to 12 mm
CertificationsFDA · CE 1935/2004 · BfR

Blue colour · international food industry standard for quick visual identification of foreign bodies. Available in solid and closed-cell sponge. High-temperature adhesive backing option for fastener-free mounting.

The product

Ferrite particles throughout the mass: if a gasket fragment breaks off, the line's metal detector identifies it.

In food and pharmaceutical processing lines, silicone gaskets, seals and coatings are wear components that degrade with use. When a fragment breaks off and falls into the product, standard food-grade silicones — even FDA-certified ones — are invisible to metal detectors: if the fragment goes undetected, it reaches the consumer and reactive traceability means batch recall, regulatory incident or sanction.

Solid metal-detectable sheet · die-cut gaskets and seals
Sponge metal-detectable sheet · doors and compression
Die-cut parts to size as per drawing
Extruded format · metal-detectable profiles and cords
Solid sheet · standard food-grade blue colour

Specifications

Product
VMQ sheet with metal ferrite throughout the mass · solid or sponge · post-cured
Detection additive
Metal ferrite on the FDA white list · inert · homogeneously distributed
Detection threshold
Fragments < 1 mm on industrial conveyor, pipeline or free-fall detectors
Thicknesses
0.5 to 12 mm · solid and sponge · other sizes on request
Roll width
1,000 mm standard · others on request
Hardness
60 Shore A in solid format · sponge by density (not ShA)
Colour
Blue · international food industry standard for visual identification
Adhesive backing
High-temperature adhesive option on thicknesses ≥ 1 mm
Service temperature
–45 °C to +200 °C continuous
Tensile strength
6 to 8 MPa (ISO 37) · comparable to standard food-grade silicone of equal hardness
Elongation at break
300 to 500 % (ISO 37)
Solid density
1.20 to 1.35 g/cm³ (including ferrite) (ISO 2781)
Sponge density
0.55 to 0.85 g/cm³ (ISO 2781)
Tolerances
Thickness ±5 % · width ±0.5 % · ISO 3302-1 class E2–E3 (calendered)
Management system
ISO 9001:2015 · ISO 13485:2016
Food contact
FDA 21 CFR 177.2600 · CE 1935/2004 · BfR IX and XV
Compatible audits
HACCP · IFS · BRC
Restricted substances
REACH (1907/2006) · RoHS (2015/863)
Post-curing
In oven · removal of residual volatiles
Added services
Roll · CNC with oscillating blade · die-cutting · adhesive backing (Spain)
Complementary formats
Same formulation available in extruded cord, profile and moulded part
Use typologies

Metal-detectable catalogue: die-cut solid, compressible sponge and in-line inspection

Die-cut solid

  • 01Flange gasket in food equipment
  • 02Washer for sanitary connection
  • 03Mixing tank lid seal

Compressible sponge

  • 01Cold room gasket
  • 02Packaging panel sealing
  • 03Compression gasket on hopper lid

Inspection and replacement

  • 01In-line inspection gasket
  • 02Non-stick coating for tray
  • 03Replacement of standard gaskets
Materials

Catalogue base series on which the ferrite is incorporated

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. It stands out for an exceptionally wide hardness range (10 to 90 Shore A) and the option of food-contact compliance depending on the formulation.

Peroxide-cured silicone compound. Provides excellent thermal stability and the option of food-contact or medical-grade use depending on the formulation.

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 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)
Detection test with industrial equipment

Batch-by-batch detection threshold verification with real industrial equipment

Each batch of metal-detectable sheet is tested with an industrial metal detector equivalent to the one the customer operates on the production line — conveyor belt, pipeline tunnel or free fall. The test confirms that the material meets the declared detection threshold (fragments < 1 mm) before leaving the workshop.

The distribution of ferrite in the compound must be homogeneous: zones with fewer particles would give false negatives on the line. The test is carried out on samples taken from the ends and the centre of the roll, ensuring that the magnetic response is stable along the entire sheet.

Each batch is delivered with a certificate of conformity, detection test result, raw material traceability (silicone + ferrite) and packaging in blue for visual identification. HACCP, IFS or BRC documentation on request.

Request test sample
Services and processes

Services and processes related to metal-detectable 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 metal-detectable sheet

Food-grade sheet Variant Food-grade sheet Learn more → Sponge sheet Variant Sponge sheet Learn more → Die-cut flat gaskets Product Die-cut flat gaskets Learn more → Food-grade tubing Product Food-grade tubing Learn more →
Do you want to replace your standard gaskets with metal-detectable ones?

Send us the list of gaskets, seals and parts you want to replace with dimensions, thicknesses and geometry (drawing if possible). We will confirm the right format (solid or sponge sheet, die-cut, extruded cord or moulded part metal-detectable) and quote with the FDA and audit documentation for your food safety dossier.

Email
info@prosilicones64.com
Form
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