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SILBIONE RTV 4411 A (5 kg)
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
Documents
Internal reference:
40-2156.KE
HS code:
39100000
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.
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.
What makes Silbione 4411 stand out
What is Silbione 4411 used for?
processing
Recommended accessories
Important instructions
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 system | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) Paste |
| Mixing ratio | 1 : 1 | 1 : 1 | 1 : 1 | 1 : 1 |
| Color | Translucent | Translucent (A) / skin-colored (B) | Translucent | Whitish-brown (A) / white (B) |
| Shore A hardness | A 11 | A 11 | A 20 | A 20 |
| Elongation at break | 1'000 % | 780 % | 650 % | 200 % |
| Tensile strength | 3.8 MPa | 3.6 MPa | 5.0 MPa | — |
| Tear resistance | 12 N/mm | 14 N/mm | 15 N/mm | 7 kN/m |
| Potting time | 60 min | 10 min | 50 min | 2 min |
| demolding time | 30 min @ 120 °C | 60 min @ 80 °C | 60 min @ 80 °C | 4 min |
| Mixed viscosity | 8,000 mPa·s | 1,500 mPa·s | 4,000 mPa·s | paste |
| Main application | Leg prosthesis liner | Liners for leg prostheses | Highly stressed liners | Orthopedic insoles |
Technical data for SILBIONE RTV 4411 A (5 kg)
| Product information | |
|---|---|
| brand | Silbione |
| Manufacturer | Elkem Silicones |
| Networking type | Addition (Platinum) |
| Container | 5 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 |
| Electrical properties | |
|---|---|
| Electrical insulation | No |
| Product approvals | |
|---|---|
| Food contact | Yes |
| Suitable for medical use | Yes |
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.
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 |
| Networking type | Addition (Platinum) |
| Container | 5 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 |
| Electrical properties | |
|---|---|
| Electrical insulation | No |
| Product approvals | |
|---|---|
| Food contact | Yes |
| Suitable for medical use | Yes |
| Keywords | |
|---|---|
| Keywords | |
| Mechanical properties | |
|---|---|
| Shore hardness A | 11.0 Shore A |
| Tensile strength | 3.8 MPa |
| Elongation at break | 1000.0 % |
| Tear resistance | 12.0 kN/m |
| Linear shrinkage | < 0.1 % |
| processing | |
|---|---|
| Viscosity Comp. A | 8,000 mPa·s |
| Viscosity Comp. B | 8,000 mPa·s |
| Pot life at 23°C | 60.0 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 packaging | 6 months |
| Storage temperature | -10 to 30 °C |
Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download: