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BLUESIL RTV 3430 SB A
BLUESIL® RTV 3430 SB A – Soft-elastic 1K component for RTV 3430 SB silicone molds
2K-Sn silicone (Shore A 28, transparent/grey) specifically for concrete mold tools in construction and plastering — highest level of detail in shape and appearance
Documents
Internal reference:
40-2306A
HS code:
39100000
Bluesil RTV 3430 SB A & B is a 2K-Sn silicone (Shore A 28, transparent/grey) specifically for concrete form tools in construction and plastering work — highest level of detail in shape and appearance.
This product range comprises 2K polyaddition silicone elastomers for reproduction in concrete, plaster, and mortar — with high elongation at break and tensile strength for reusable concrete tools. RTV 3430 SB is tailored to specific industrial applications — the most important properties and areas of application are listed below.
Bluesil RTV 3430 SB is specifically designed for the production of flexible molds for concrete parts — the molds can be stored and reused for long periods of time, with high precision in shape, appearance and dimensions.
What makes the RTV 3430 SB stand out
What is the RTV 3430 SB used for?
processing
Recommended accessories
Important instructions
RTV 3430 SB 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 3430 SB Current product |
RTV 3325 → | RTV 3318 SPU → | Calsil PC 30 → | |
|---|---|---|---|---|
| Networking system | 2K Polyaddition (Pt) | 2K Condensation (Sn) | 2K Condensation (Sn) | 2K Condensation (Sn) |
| Mixing ratio | 10 : 1 | 100 : 5 (Cata) | 100 : 5 (CATA SPU) | with CATA |
| Color | Transparent / grey (B) | White | White | — |
| Shore A hardness | A 28 | A 25–28 | A 18 | A 30 |
| Elongation at break | 600 % | 440–490 % | 520 % | — |
| Tensile strength | 6 MPa | 4–4.3 MPa | 3.3 MPa | — |
| Tear resistance | 20 kN/m | 21–26 kN/m | 19 kN/m | — |
| Potting time | 1 h | 90–150 min (hr) | 90–150 min | — |
| demolding time | 10 h | 24 h (Standard) / 6 h (Fast) | 24 h | — |
| Mixed viscosity | 20,000 mPa·s | 35,000 mPa·s | 25,000 mPa·s | — |
| Main application | Concrete components (construction) | lost-wax molds | Polyurethane casting resin molds | Model making molds |
Technical data for BLUESIL RTV 3430 SB A
| Product information | |
|---|---|
| brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Networking type | Addition (Platinum) |
| Container | 5 kg, 20 kg |
| 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) | 28 |
| Electrical properties | |
|---|---|
| Electrical insulation | No |
| Curing values | |
|---|---|
| Potting time (min) | 180 |
| Demolding time (min) | 24 |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 4.5 |
| Elongation at break (%) | 450 |
| Tensile strength (N/mm) | 20 |
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 3430 SB
Practical questions regarding processing and design — answered by SILITECH.
Bluesil RTV 3430 SB A & B: 2K tin silicone (Shore A 28, transparent/grey) specifically for concrete formwork tools in construction and plastering — highest level of detail in shape and appearance. Main applications include concrete components (construction), plastering, paving stones, and slabs.
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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Our technical team will advise you personally on material selection, processing questions, and individual requirements. Quickly and competently.
Product specifications
| Product information | |
|---|---|
| Container | 5 kg or 20 kg |
| 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) | 28 |
| Electrical properties | |
|---|---|
| Electrical insulation | No |
| Curing values | |
|---|---|
| Potting time (min) | 180 |
| Demolding time (min) | 24 |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 4.5 |
| Elongation at break (%) | 450 |
| Tensile strength (N/mm) | 20 |
| Keywords | |
|---|---|
| Keywords | |
| Mechanical properties | |
|---|---|
| Shore hardness A | 28.0 Shore A |
| Tensile strength | 4.5 MPa |
| Elongation at break | 450.0 % |
| Tear resistance | 20.0 kN/m |
| Linear shrinkage | < 0.1 % |
| processing | |
|---|---|
| Viscosity of mixture | 15,000 mPa·s |
| Viscosity Comp. A | 28,000 mPa·s |
| Viscosity Comp. B | 2,000 mPa·s |
| Pot life at 23°C | 180.0 min |
| demolding time | 1440.0 min |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 1.2 g/cm³ |
| Temperature resistance (duration) | -55 to 200 °C |
| Peak temperature (short-term) | 200 °C |
| storage | |
|---|---|
| Shelf life in original packaging | 12 months |
| Storage temperature | -10 to 30 °C |
Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download:
- Bluesil RTV 3430 SB A - Fiche Technique FR.pdf (166 KB)
- Bluesil RTV 3430 SB A - Fiche de Sécurité FR.pdf (501 KB)
- Bluesil RTV 3430 SB A - Scheda di Sicurezza IT.pdf (493 KB)
- Bluesil RTV 3430 SB A - Safety Data Sheet DE.pdf (297 KB)
- Bluesil RTV 3430 SB A - Technical Data Sheet EN.pdf (535 KB)
- Bluesil RTV 3430 SB A - Technical Data Sheet DE.pdf (191 KB)