Silbione RTV 4410 1:1 QC A&B
Biocompatible two-component silicone elastomer, Shore A 11 — medical-grade material for prosthetic liners and soft padding.
Silbione RTV 4410 1:1 QC A&B — biocompatible two-component addition-curing silicone from Elkem.
Shore A 11, 780% elongation at break, sterilizable. Ideal for prosthetic liners, heel cushions, and medical soft padding.
Silbione RTV 4410 1:1 QC A&B — biocompatible two-component silicone elastomer
Silbione RTV 4410 1:1 QC A&B is an addition-curing, platinum-catalyzed two-component silicone elastomer from Elkem Silicones that cures at room temperature via a polyaddition reaction. The two low-viscosity components are mixed in a 1:1 ratio (by weight) and cure without heat generation to form a highly elastic, skin-friendly elastomer.
Note: Component A (translucent, Pt catalyst) and Component B SKIN (skin-colored, SiH crosslinker) are supplied in pairs in the kit and must always be mixed together in a 1:1 ratio by weight.
product benefits
- Very high elongation at break (approx. 780%) with a Shore A hardness of 11 — soft and gentle on the skin
- Biocompatible and sterilizable — approved for medical and pharmaceutical applications
- Low viscosity (~1500 mPa·s) for easy, low-bubble application
- Curing without heat generation and without decomposition products
- Curing at room temperature or accelerated by heat
- High tear resistance (approx. 14 N/mm) despite a soft setting
Examples of use
- Liners for arm and leg prostheses
- Heel cushions and pressure-relieving soft pads
- Toe separators and small orthopedic components
- Custom orthotics and rehabilitation components
- Skin-friendly soft silicone molded parts for medical applications
Technical Specifications — Uncross-linked
| property | Component A | Component B SKIN |
|---|---|---|
| Catalyst / Cross-linking agent | Platinum (Pt) | SiH |
| Color | translucent | skin-colored |
| appearance | low-viscosity liquid | |
| Density (23 °C) | approx. 1.07 g/cm³ | |
| Viscosity (23 °C) | approx. 1500 mPa·s | |
Application and mixing ratio
| Mixing ratio A : B (parts by weight) | 1 : 1 |
| Pot life at 23 °C | about 10 minutes |
| Curing (recommended) | 60 minutes at 80 °C |
| Curing at room temperature | possible, slower |
Mechanical properties — cross-linked (60 min / 80 °C)
| Shore A hardness (DIN 53505) | approx. 11 |
| Tensile strength (DIN 53504) | approx. 3.6 N/mm² |
| Elongation at break (DIN 53504) | approx. 780% |
| Tear resistance (DIN 53515) | approx. 14 N/mm |
Processing instructions
- Stir both components thoroughly before each use (they may settle).
- Weigh A and B in an exact 1:1 ratio by weight and mix thoroughly to minimize air bubbles—using a hand mixer, low-speed mixer, or dosing machine.
- Degas the mixture at 30–50 mbar; it will expand to 3–4 times its original volume, bubbles will rise, and then release the vacuum.
- 1–2× pressure relief accelerates degassing. Use containers with a high diameter-to-height ratio.
- Apply by pouring (gravity or low-pressure); cure slowly at 23 °C or accelerate curing at 80 °C.
Cross-linking inhibitors — avoid
Contact with the following materials may prevent or delay curing:
- Sulfur-vulcanized natural rubber
- Tin-catalyzed RTV-2 silicone elastomers
- Tin-stabilized PVC
- Amine-catalyzed epoxy resins
If in doubt, test with a small sample on a limited area of the substrate.
Regulatory and Biocompatibility
SILBIONE® RTV 4410 1:1 QC A and B SKIN have undergone extensive toxicological testing and meet regulatory requirements for medical and pharmaceutical applications in several countries. Detailed certificates and country-specific approvals are available upon request.
Storage and shelf life
Store in unopened original packaging at temperatures between -10 °C and +30 °C. Shelf life: 6 months from the date of manufacture (both components). After this period, the manufacturer no longer guarantees compliance with specifications.
Available sizes
- Kit 1 kg + 1 kg — for laboratory use, prototyping, and small-scale production
- Kit 25 kg + 25 kg — for mass production (pail)
SILITECH AG — Your Swiss partner for technical and medical silicone systems. Expert advice, Swiss warehouse, personalized service.
Frequently Asked Questions About Silbione RTV 4410
Elkem's Medical-Grade 2K Silicone — Biocompatibility, Processing, and Typical Applications.
Silbione RTV 4410 1:1 QC A&B is a biocompatible two-component silicone designed for soft medical applications: liners for arm and leg prostheses, heel cushions, toe separators, and soft orthopedic padding. The combination of a Shore A hardness of 11 and 780% elongation at break makes it particularly skin-friendly.
Yes. Silbione RTV 4410 1:1 QC A&B has undergone comprehensive toxicological testing by Elkem Silicones and meets regulatory requirements for medical and pharmaceutical applications in several countries. The cured elastomer is sterilizable.
Silbione RTV 4410 1:1 QC A&B achieves, after curing (60 min at 80 °C), a Shore A hardness of approx. 11, a tensile strength of approx. 3.6 N/mm², an elongation at break of approx. 780%, and a tear resistance of approx. 14 N/mm according to DIN 53504/53505/53515.
Silbione RTV 4410 1:1 QC A&B has a pot life of approximately 10 minutes at 23 °C. The recommended curing time is 60 minutes at 80 °C; curing is also possible at room temperature, but proceeds more slowly. Heat accelerates the process, while cold slows it down.
product specifications
| container | 1 kg + 1 kg or 25 kg + 25 kg |
| brand | silbione |
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