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SILBIONE RTV 4411 A (1 kg)

SILBIONE RTV 4411 A (1 kg)

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Very soft 2K-Pt silicone with exceptionally high elongation.

Very soft 2K-Pt silicone (Shore A 11) with exceptionally high elongation (1,000%) — standard version (60 min pot life) for prostheses, liners and orthopedic applications

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  • Manufacturer
  • Mixing ratio
  • Networking type
  • Container
  • Number of components
  • consistency
  • Mixing ratio
  • UV resistance
  • Paint has hardened
  • Self-leveling
  • Density (g/cm³)
  • Viscosity uncrosslinked (mPa·s)
  • Electrical insulation
  • Food contact
  • Suitable for medical use
  • Tensile strength (MPa)
  • Elongation at break (%)
  • Tensile strength (N/mm)

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Silicone USP CLASS VI 2K silicone SILBIONE ELKEM Swiss bearing biocompatible FDA RTV Addition Platinum base component very soft high elongation 1 kg 1:1 Medical-Grade ISO 10993 sterilizable Orthopedics Prosthetic liner Heel cushion Toe separator RTV 4411 1000% Shore A 11 Prosthetics

 
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. Express logistics. Fast and reliable within Switzerland & Europe.

Shipping from Swiss warehouse within 24 hours. Batch certificate. Invoice within 30 days (B2B). Technical support.
Shipping & Delivery

Usually 1 to 3 working days

Availability will be confirmed after order receipt.

Express logistics within Switzerland & Europe.

General Terms and Conditions →

Product data

Internal reference: 40-2156.DO

HS code: 3910.0000

Internal reference: 40-2156.DO
HS code: 3910.0000

SILBIONE RTV 4411 A (1 kg)
SILBIONE RTV 4411 A (1 kg)
Silbione · Elkem Silicones · SKU 40-2156.DO

Silbione RTV 4411 A & B is a very soft 2K-Pt silicone (Shore A 11) with exceptionally high elongation (1,000%) — standard variant (60 min pot life) for prostheses, liners and orthopedic applications.

This product line comprises medically approved, sterilizable 2K polyaddition silicone elastomers for prosthetic liners and orthopedic comfort components — very high elasticity, biocompatible. Silbione 4411 is tailored to specific industrial applications — the most important properties and areas of application are listed below.

1,000% elongation at break — highest elongation

Silbione RTV 4411 is the highly elastic standard variant of the 4400 series — 1,000% elongation at break, 60 min pot life. Low viscosity (8,000 mPa·s), translucent. Proven in high-performance prosthetic applications with extreme mechanical stress.

Silbione 4411 in figures
Shore A 11
very soft
1'000 %
Elongation at break
60 min
Potting time
Sterilizable
medicine

What makes Silbione 4411 stand out

Maximum elasticity (1,000%)
Withstands extreme prosthetic stress without tearing.
Long potting time (60 min)
Careful manual processing, even for large components.
Low viscosity (8,000 mPa·s)
Easily pourable into complex geometries.
Sterilizable
Suitable for medical use with sterilization cycles.
Translucent
Visual inspection of potted components is possible.
Medical license
Meets regulatory requirements for medical applications.

What is Silbione 4411 used for?

Leg prosthesis liner
High-performance liners for demanding prosthetic applications.
Heel cushions
Pressure relief in the heel area with high load-bearing capacity.
Toe separators
Highly elastic intertoe separators.
Highly stressed orthopedics
Applications with extreme mechanical stress.
Custom-made prostheses
Workshop adaptation in orthopedics.
Rehabilitation comfort components
Comfort components in rehabilitation.
Data sheets & safety data sheet
Full TDS and SDS in DE, EN, FR — view or download directly.
To the documents →

processing

1
Prepare the form
Cleanroom conditions — mold clean and dry.
2
Mix 1:1
Mix components by weight. Wear vinyl or nitrile gloves (no latex).
3
Degas
30–50 mbar vacuum for bubble-free liners. Low viscosity (1,500–8,000 mPa·s).
4
Shed
Slowly pour into the mold. Processing time 10–60 min depending on the variant.
5
Networking + Sterilizing
30–60 min at 80–120 °C. Subsequently sterilizable using standard methods.

Recommended accessories

Bluesil Inhibitor 3
Pot life extender for polyaddition silicone systems (Pt-Cure).
View product →

Important instructions

Mixing & Dosage
Stir A and B thoroughly before each use. Use precise dosage in the specified ratio (see table above) — ideally by weight. Incorrect dosage will result in incomplete cross-linking.
Degassing
Degas the mixture under a vacuum of 30–50 mbar. The material expands 3–4 times, then contracts back to its original size after 5–10 minutes. Interrupt the vacuum several times for better degassing.
Avoid inhibitors
Polyaddition silicones are inhibited by: sulfur-vulcanized rubber, tin-catalyzed RTV, amine epoxides, and PVC with tin salts. If in doubt, conduct a preliminary test.
Application advice
SILITECH will advise you on the optimal RTV variant for your application — substrate, hardness, pot life, mechanics. Contact us with your specific application details.

Silbione 4411 compared to related RTV products

Networking system, mechanics, and processing times side by side — all values ​​from the official Elkem TDS. “— " = not specified in the datasheet.

Silbione 4411
Current product		 Silbione 4410 QC →Silbione 4420 →Silbione 4320 →
Networking system2K Polyaddition (Pt)2K Polyaddition (Pt)2K Polyaddition (Pt)2K Polyaddition (Pt) Paste
Mixing ratio1 : 11 : 11 : 11 : 1
ColorTranslucentTranslucent (A) / skin-colored (B)TranslucentWhitish-brown (A) / white (B)
Shore A hardnessA 11A 11A 20A 20
Elongation at break1'000 %780 %650 %200 %
Tensile strength3.8 MPa3.6 MPa5.0 MPa—
Tear resistance12 N/mm14 N/mm15 N/mm7 kN/m
Potting time60 min10 min50 min2 min
demolding time30 min @ 120 °C60 min @ 80 °C60 min @ 80 °C4 min
Mixed viscosity8,000 mPa·s1,500 mPa·s4,000 mPa·spaste
Main applicationLeg prosthesis linerLiners for leg prosthesesHighly stressed linersOrthopedic insoles
Topics & Application Areas
Key terms related to this product. Also useful for our search and filters.
Silicone USP CLASS VI 2K silicone SILBIONE ELKEM Swiss bearing biocompatible FDA RTV Addition Platinum base component very soft high elongation 1 kg 1:1 Medical-Grade ISO 10993 sterilizable Orthopedics Prosthetic liner Heel cushion Toe separator RTV 4411 1000% Shore A 11 Prosthetics

Technical data for SILBIONE RTV 4411 A (1 kg)

All 19 product information 8 Further properties 1 Physical properties 4 Electrical properties 1 Product approvals 2 Mechanical properties 3
Product information
brand Silbione
Manufacturer Elkem Silicones
Mixing ratio 1 : 1
Networking type Addition (Platinum)
Container 1 kg
Number of components 2K (two-component)
consistency Flowable
Mixing ratio 1:1
Other features
UV resistance No
Physical properties
Paint has hardened Transparent
Self-leveling Yes
Density (g/cm³) 1.07
Viscosity uncrosslinked (mPa·s) 8000
Electrical properties
Electrical insulation No
Product approvals
Food contact Yes
Suitable for medical use Yes
Mechanical properties
Tensile strength (MPa) 3.8
Elongation at break (%) 1000
Tensile strength (N/mm) 12

For binding values, please refer to the technical data sheet (TDS) in the "Documents" tab.

Documents and datasheets

Click on a document for a preview or the download icon for a direct download.

Technical Data Sheets (TDS) 1
Silbione RTV 4411 A - Technical Data Sheet EN.pdf
445 KB
Safety Data Sheets (SDS) 3
Silbione RTV 4411 A - Safety Data Sheet DE.pdf
308 KB
Silbione RTV 4411 A - Fiche de Sécurité FR.pdf
512 KB
Silbione RTV 4411 A - Scheda di Sicurezza IT.pdf
504 KB

Frequently asked questions about Silbione 4411

Practical questions regarding processing and design — answered by SILITECH.

Silbione RTV 4411 A & B: Very soft 2-component polyurethane silicone (Shore A 11) with exceptionally high elongation (1,000%) — standard version (60 min pot life) for prostheses, liners, and orthopedic applications. Main applications include leg prosthesis liners, heel cushions, and toe separators.

Polyaddition crosslinking is a two-component silicone chemistry using a platinum catalyst. Component A contains the platinum complex, and component B contains the SiH crosslinker. When mixed, the components crosslink without releasing reaction byproducts—no shrinkage due to outgassing, excellent dimensional accuracy, and low linear shrinkage. Important: Polyaddition silicones are inhibited by various substances—sulfur-vulcanized natural rubbers, tin-catalyzed RTV silicones, amine-catalyzed epoxy resins, and tin-stabilized PVC. In case of doubt, a preliminary test should be carried out.

Thoroughly stir components A and B before each processing step. Measure precisely according to the mixing ratio specified in the TDS (see comparison table above) – ideally by weight. Mix with an electric or pneumatic agitator at low speed (minimize air entrainment). Degas the mixture under vacuum (30–50 mbar) – the material will expand 3–4 times its original volume, bubbles will escape, and the material will settle back after 5–10 minutes. Then slowly pour into the mold from the lowest point to avoid air entrapment. For polyaddition systems, avoid contact with inhibitors (sulfur-based rubber, tin-based RTV, amine epoxides, PVC with tin salts).

Store in the unopened original container in a dry, cool place — typically between +5 and +30 °C, see TDS for exact values. Store components A and B separately; seal airtight after opening. Polyaddition systems are insensitive to moisture, but should be stored in a cool place to maintain pot life. Consult the Safety Data Sheet (SDS) before use.

The comparison table above lists related RTV products with different hardnesses, pot lives, or application profiles. If you are unsure which product is best for you, we would be happy to advise you — contact SILITECH with details of your application (substrate, desired hardness, processing time, mechanical requirements, and durability).

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Product specifications

Product information
brand Silbione
Manufacturer Elkem Silicones
Mixing ratio 1 : 1
Networking type Addition (Platinum)
Container 1 kg
Number of components 2K (two-component)
consistency Flowable
Mixing ratio 1:1
Other features
UV resistance No
Physical properties
Paint has hardened Transparent
Self-leveling Yes
Density (g/cm³) 1.07
Viscosity uncrosslinked (mPa·s) 8000
Electrical properties
Electrical insulation No
Product approvals
Food contact Yes
Suitable for medical use Yes
Mechanical properties
Tensile strength (MPa) 3.8
Elongation at break (%) 1000
Tensile strength (N/mm) 12
Keywords
Keywords
Silicone USP CLASS VI 2K silicone SILBIONE ELKEM Swiss bearing biocompatible FDA RTV Addition Platinum base component very soft high elongation 1 kg 1:1 Medical-Grade ISO 10993 sterilizable Orthopedics Prosthetic liner Heel cushion Toe separator RTV 4411 1000% Shore A 11 Prosthetics
Mechanical properties
Shore hardness A11.0 Shore A
Tensile strength3.8 MPa
Elongation at break1000.0 %
Tear resistance12.0 kN/m
Linear shrinkage< 0.1 %
processing
Viscosity Comp. A8,000 mPa·s
Viscosity Comp. B8,000 mPa·s
Pot life at 23°C60.0 min
Physical & Thermal
Density (23°C)1.07 g/cm³
Temperature resistance (duration)-50 to 150 °C
Peak temperature (short-term)150 °C
storage
Shelf life in original packaging6 months
Storage temperature-10 to 30 °C

Documents and datasheets

Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download: