BLUESIL RTV 141 B
BLUESIL® RTV 141 B – Catalyst component for highly transparent silicone potting compounds
Transparent, optically clear 2K-Pt silicone potting compound (Shore A 50) for embedding electronic components, optical fibers and barrier photocells
Documents
Internal reference:
40-901
HS code:
39100000
Bluesil RTV 141 A & B is a transparent, optically clear 2K-Pt silicone potting compound (Shore A 50) for embedding electronic components, optical fibers and barrier photocells.
This product line comprises 2K polyaddition silicone elastomers with optical clarity for electronics encapsulation, optoelectronics, and photovoltaic cells — defined refractive index, high transparency. RTV 141 is tailored to specific industrial applications — the most important properties and areas of application are listed below.
Bluesil RTV 141 is a clear, transparent, two-component potting silicone with good optical transmission—specifically for encapsulating optical fibers, insulating photocells, and creating optoelectronic connections. It is reversibility-resistant even in the absence of air.
What makes RTV 141 stand out
What is the RTV 141 used for?
processing
Recommended accessories
Important instructions
RTV 141 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.
RTV 141 Current product |
ESA 7250 → | RTV 147 → | ESA 6110 → | |
|---|---|---|---|---|
| Networking system | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) Gel |
| Mixing ratio | 10 : 1 | 10 : 1 | 10 : 1 | 1 : 1 |
| Color | Transparent, colorless | Optically clear, colorless | Beige / light blue (B) | Visually clear |
| Shore A hardness | A 50 | A 52 | A 60 | Gel (Penetration 250) |
| Elongation at break | 120 % | 115 % | 180 % | — |
| Tensile strength | 6 MPa | 6.2 MPa | 6 MPa | — |
| Tear resistance | — | 4 kN/m | >15 kN/m | — |
| Potting time | 4 h | 4 h | 2 h | 50 min (Std) / 5 min (QC) |
| demolding time | 24–48 h | 24–48 h | 24–48 h | 120–180 min |
| Mixed viscosity | 4,000 mPa·s | 4,000 mPa·s | 150,000 mPa·s | 1,200 mPa·s |
| Main application | Optoelectronic connections | Electronic potting | Thermal insulation devices | Electronic encapsulation (potting) |
Technical data for BLUESIL RTV 141 B
| Product information | |
|---|---|
| brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Networking type | Addition (Platinum) |
| Number of components | 2K (two-component) |
| consistency | Flowable |
| Mixing ratio | 10:1 |
| Other features | |
|---|---|
| UV resistance | No |
| Physical properties | |
|---|---|
| Paint has hardened | Transparent |
| Self-leveling | Yes |
| Viscosity uncrosslinked (mPa·s) | 30 |
| Electrical properties | |
|---|---|
| Electrical insulation | Yes |
| Curing values | |
|---|---|
| Potting time (min) | 3 |
| Demolding time (min) | 15 |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 4 |
| Elongation at break (%) | 500 |
| Tensile strength (N/mm) | 15 |
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) 3
Frequently asked questions about RTV 141
Practical questions regarding processing and design — answered by SILITECH.
Bluesil RTV 141 A & B: Transparent, optically clear 2K Pt silicone potting compound (Shore A 50) for embedding electronic components, optical fibers, and junction photocells. Main applications include optoelectronic connections, junction photocell insulation, and electronic component potting.
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 | Bluesil |
| Manufacturer | Elkem Silicones |
| Networking type | Addition (Platinum) |
| Number of components | 2K (two-component) |
| consistency | Flowable |
| Mixing ratio | 10:1 |
| Other features | |
|---|---|
| UV resistance | No |
| Physical properties | |
|---|---|
| Paint has hardened | Transparent |
| Self-leveling | Yes |
| Viscosity uncrosslinked (mPa·s) | 30 |
| Electrical properties | |
|---|---|
| Electrical insulation | Yes |
| Curing values | |
|---|---|
| Potting time (min) | 3 |
| Demolding time (min) | 15 |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 4 |
| Elongation at break (%) | 500 |
| Tensile strength (N/mm) | 15 |
| Keywords | |
|---|---|
| Keywords | |
| Mechanical properties | |
|---|---|
| Shore hardness A | 50.0 Shore A |
| Tensile strength | 6.0 MPa |
| Elongation at break | 120.0 % |
| Linear shrinkage | < 1.2 % |
| processing | |
|---|---|
| Viscosity of mixture | 4,000 mPa·s |
| Viscosity Comp. A | 3,500 mPa·s |
| Viscosity Comp. B | 650 mPa·s |
| Pot life at 23°C | 240.0 min |
| demolding time | 2160.0 min |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 1.02 g/cm³ |
| Refractive index n (20°C) | 1.406 |
| Temperature resistance (duration) | -70 to 200 °C |
| Peak temperature (short-term) | 200 °C |
| thermal conductivity | 0.16 W/(m·K) |
| Electrical characteristics | |
|---|---|
| Dielectric constant ε (1 kHz) | 2.7 |
| Dielectric strength | 20.0 kV/mm |
| Contact resistance | 1e+15 Ω·cm |
| Loss factor tan δ | 0.001 |
| storage | |
|---|---|
| Shelf life in original packaging | 24 months |
| Storage temperature | -5 to 30 °C |
Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download:
- Bluesil RTV 141 B E5 - Fiche Technique FR.pdf (205 KB)
- Bluesil RTV 141 B E5 - Fiche de Sécurité FR.pdf (498 KB)
- Bluesil RTV 141 B E5 - Scheda di Sicurezza IT.pdf (491 KB)
- Bluesil RTV 141 B E5 - Safety Data Sheet DE.pdf (294 KB)
- Bluesil RTV 141 B E5 - Technical Data Sheet EN.pdf (547 KB)
- Bluesil RTV 141 B E5 - Technical Data Sheet DE.pdf (197 KB)