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BLUESIL RTV 148 A (200 kg)
Low-viscosity 2K-Pt silicone potting compound variant of the RTV-147/148 family.
Low-viscosity 2K-Pt silicone potting compound variant of the RTV-147/148 family (Shore A 40 with RTV 147 B) for easy-to-pour high-temperature embedding
Documents
Internal reference:
40-907A.FA.K200
HS code:
39100000
Bluesil RTV 148 A is a low-viscosity 2K-Pt silicone potting compound variant of the RTV-147/148 family (Shore A 40 with RTV 147 B) for easy-to-pour high-temperature embedding.
This product range comprises 2K polyaddition silicone elastomers with very high temperature resistance (peak up to +300 °C) for thermal insulation, flexible insulating materials, and high-performance electrotechnical embedding. RTV 148 is tailored to specific industrial applications—the most important properties and areas of application are listed below.
Bluesil RTV 148 A is the low-viscosity sister component of RTV 147 — when combined with RTV 147 B, it forms a mixture with a viscosity of only 10,000 mPa·s, ideal for applications with complex geometries and narrow gap widths. Hardness of the vulcanizate: Shore A 40.
What makes RTV 148 stand out
What is the RTV 148 used for?
processing
Recommended accessories
Important instructions
RTV 148 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 148 Current product |
RTV 147 → | RTV 141 → | RTV 8352 LV → | |
|---|---|---|---|---|
| Networking system | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) | 2K Polyaddition (Pt) |
| Mixing ratio | 10 : 1 (with RTV 147 B) | 10 : 1 | 10 : 1 | 1 : 1 |
| Color | Beige / light blue (B) | Beige / light blue (B) | Transparent, colorless | Whitish |
| Shore A hardness | A 40 | A 60 | A 50 | A 55 |
| Elongation at break | 160 % | 180 % | 120 % | 78 % |
| Tensile strength | 3.5 MPa | 6 MPa | 6 MPa | 2.3 MPa |
| Tear resistance | — | >15 kN/m | — | — |
| Potting time | 4 h | 2 h | 4 h | 130 min |
| demolding time | 24–48 h | 24–48 h | 24–48 h | 8 h |
| Mixed viscosity | 10,000 mPa·s | 150,000 mPa·s | 4,000 mPa·s | 2,200 mPa·s |
| Main application | Low-viscosity, high-temperature potting compound | Thermal insulation devices | Optoelectronic connections | Electrical Engineering Encapsulation |
Technical data for BLUESIL RTV 148 A (200 kg)
| Product information | |
|---|---|
| brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Networking type | Addition (Platinum) |
| Container | 200 kg |
| Number of components | 2K (two-component) |
| consistency | Flowable |
| Mixing ratio | 10:1 |
| Other features | |
|---|---|
| UV resistance | No |
| Physical properties | |
|---|---|
| Paint has hardened | Beige |
| Self-leveling | Yes |
| Viscosity uncrosslinked (mPa·s) | 10'000 |
| Electrical properties | |
|---|---|
| Electrical insulation | Yes |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 6 |
| Elongation at break (%) | 3 |
| 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 148
Practical questions regarding processing and design — answered by SILITECH.
Bluesil RTV 148 A: Low-viscosity 2K-Pt silicone potting compound variant of the RTV-147/148 family (Shore A 40 with RTV 147 B) for easily castable high-temperature embeddings. Main applications include low-viscosity high-temperature potting, flexible insulation materials, and electrical engineering embedding.
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) |
| Container | 200 kg |
| Number of components | 2K (two-component) |
| consistency | Flowable |
| Mixing ratio | 10:1 |
| Other features | |
|---|---|
| UV resistance | No |
| Physical properties | |
|---|---|
| Paint has hardened | Beige |
| Self-leveling | Yes |
| Viscosity uncrosslinked (mPa·s) | 10'000 |
| Electrical properties | |
|---|---|
| Electrical insulation | Yes |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 6 |
| Elongation at break (%) | 3 |
| Tensile strength (N/mm) | 15 |
| Keywords | |
|---|---|
| Keywords | |
| Mechanical properties | |
|---|---|
| Shore hardness A | 40.0 Shore A |
| Modulus at 100% elongation | 2.2 MPa |
| Tensile strength | 3.5 MPa |
| Elongation at break | 160.0 % |
| Linear shrinkage | < 0.1 % |
| processing | |
|---|---|
| Viscosity of mixture | 10,000 mPa·s |
| Viscosity Comp. A | 10,000 mPa·s |
| Viscosity Comp. B | 10,000 mPa·s |
| Pot life at 23°C | 240.0 min |
| demolding time | 2160.0 min |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 1.23 g/cm³ |
| Temperature resistance (duration) | -70 to 250 °C |
| Peak temperature (short-term) | 300 °C |
| thermal conductivity | 0.31 W/(m·K) |
| Electrical characteristics | |
|---|---|
| Dielectric constant ε (1 kHz) | 2.9 |
| Dielectric strength | 18.0 kV/mm |
| Contact resistance | 5e+14 Ω·cm |
| Loss factor tan δ | 0.003 |
| storage | |
|---|---|
| Shelf life in original packaging | 18 months |
| Storage temperature | -20 to 30 °C |
Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download:
- Bluesil RTV 148 A - Fiche Technique FR.pdf (201 KB)
- Bluesil RTV 148 A - Fiche de Sécurité FR.pdf (530 KB)
- Bluesil RTV 148 A - Scheda di Sicurezza IT.pdf (520 KB)
- Bluesil RTV 148 A - Safety Data Sheet DE.pdf (324 KB)
- Bluesil RTV 148 A - Technical Data Sheet EN.pdf (426 KB)
- Bluesil RTV 148 A - Technical Data Sheet DE.pdf (192 KB)