Bluesil RTV 3440 A
BLUESIL RTV 3440 A (25 kg) — Base for addition-cure silicone, Shore A 40, fast demolding in 6 hours.
BLUESIL RTV 3440 A — Base component of a two-component addition-curing silicone.
25 kg bucket. Mixed with Catalyst 3440 B (blue) in a 100:10 ratio. Shore A 40, demolding possible after just 6 hours at room temperature. Ideal for time-sensitive production molding. Shipped from our Swiss warehouse.
documents
Internal reference:
40-2300.KE
HS Code:
39100000
BLUESIL RTV 34xx Series – addition-curing mold-making silicones with a range of hardness levels
The BLUESIL RTV 34xx family is Elkem’s range of two-component, polyaddition-curing silicone elastomers for mold making and prototyping. All variants are platinum-cured and cure at room temperature without off-gassing —the mold shrinks only minimally (0.1%), the material is chemically and thermally resistant, and the detail resolution is in the submicrometer range.
The key difference between the variants is the Shore A hardness, which ranges from 12 (very soft, for pad printing pads) to 50 (hard, for durable production molds). Choose the appropriate variant based on your application:
| Variant | Shore A | pot life | Demold | main use |
|---|---|---|---|---|
| RTV 3410 QC | 12 | 10 min | 30–40 min | Pad printing pads, tile rollers |
| RTV 3428 | 28 | 60 min | 4:00 p.m. | Composite molds (aerospace, boat building) |
| RTV 3430 SB | 28 | 180 minutes | 24 hours | Self-bleeding, delicate reproduction |
| RTV 3440 | 40 | 90 min | 6 hours | Standard mold, quick demolding |
| RTV 3445 | 45 | 60 min | 24 hours | medium-hard, lower mixing viscosity |
| RTV 3450 | 50 | 90 min | 4:00 p.m. | The toughest version, production molds |
Materials that can be cast include plaster, wax, polyester, polyurethane, epoxy, low-melting-point metals, and many other casting materials.
What's in this container?
Base component A (viscous liquid). Mix with catalyst B in a ratio of 100:10. 25 kg bucket of base component.
BLUESIL RTV 3440 in detail
BLUESIL RTV 3440 is the Shore A 40 variant with an outstanding feature: demolding is possible after just 6 hours at room temperature. This cuts the production cycle time in half compared to many other molding silicones, making RTV 3440 the top choice for high-volume production in a single-day cycle. Mixing viscosity 15,000 mPa·s, pot life 90 min—enough time for larger molds.
Typical applications
- Plaster, wax, polyester, and low-melting-point metal castings
- Paced production with 2–3 cycles per day per mold
- Rugged, versatile applications in the medium-hard range
Inhibition Warning
Platinum-cured RTVs are inhibited in trace amounts by:
- Natural or synthetic rubber containing sulfur (natural rubber, NBR, neoprene gloves)
- Metal-salt-catalyzed condensation RTV (tin)
- Tin-stabilized PVC
- Epoxides cured with amines
- Certain organic solvents (ketones, alcohols, ethers)
Practical advice: Set aside a separate venting chamber for addition-cure RTV; if in doubt, conduct a preliminary test at a test site.
storage
Can be stored for up to 12 months in unopened original packaging at temperatures between −10°C and +30°C.
BLUESIL RTV 3440 A (25 kg) is supplied by SILITECH AG with technical support, a batch certificate, and shipping from our Swiss warehouse within 24 hours.
Technische Daten zu Bluesil RTV 3440 A
| Physical properties | |
|---|---|
| Paint cured | beige |
| Self-leveling | Yes |
| consistency | Flowable |
| product information | |
|---|---|
| brand | Bluesil |
| network type | Addition (Platinum) |
| container | 1 kg, 25 kg |
| manufacturer | Elkem Silicones |
| Number of components | 2K (two-component) |
| mixing ratio | 10:1 |
| Additional features | |
|---|---|
| UV resistance | No |
| product approvals | |
|---|---|
| food contact | No |
| Suitable for medical use | No |
| Areas of application | |
|---|---|
| Main application | Formenbau, Prototyping |
| Electrical Properties | |
|---|---|
| Electrical insulation | No |
| General | |
|---|---|
| Density (g/cm³) | 1.3 |
| Viskosität unvernetzt (mPa·s) | 40,000 |
| mixing ratio | 10 to 1 |
| Pot life (min) | 90 |
| Entformzeit (min) | 6 |
| Tensile strength (MPa) | 4 |
| Elongation at break (%) | 300 |
| Reißfestigkeit (N/mm) | 9 |
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Frequently Asked Questions About BLUESIL RTV 3440 A (25 kg)
Answers regarding the application and processing of BLUESIL RTV 3440 A (25 kg).
Addition-cure silicones (platinum) cross-link without producing by-products, resulting in minimal shrinkage (0.1%) and high dimensional stability. Condensation-cure RTV silicones shrink significantly more (0.4–1.2%). Addition-cure silicones are the first choice for dimensionally accurate prototypes and production molds.
Check the substrate before pouring: Contact with sulfur, tin, amines, or certain solvents will halt the curing process. Conduct a preliminary test using a small test strip to be sure. A separate venting chamber for addition-cure RTV reduces cross-contamination.
Yes, using heat up to a maximum of 60°C to minimize shrinkage. Higher temperatures significantly shorten the pot life and can cause dimensional changes—for precise shapes, room-temperature curing is preferred.
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Unser Technik-Team berät Sie persönlich bei Materialauswahl, Verarbeitungsfragen und individuellen Anforderungen — schnell und kompetent.
product specifications
| Physical properties | |
|---|---|
| Paint cured | beige |
| Self-leveling | Yes |
| consistency | Flowable |
| product information | |
|---|---|
| container | 1 kg or 25 kg |
| brand | Bluesil |
| network type | Addition (Platinum) |
| manufacturer | Elkem Silicones |
| Number of components | 2K (two-component) |
| mixing ratio | 10:1 |
| Additional features | |
|---|---|
| UV resistance | No |
| product approvals | |
|---|---|
| food contact | No |
| Suitable for medical use | No |
| Areas of application | |
|---|---|
| Main application | Mold making or Prototyping |
| Electrical Properties | |
|---|---|
| Electrical insulation | No |
| Uncategorized | |
|---|---|
| Density (g/cm³) | 1.3 |
| Viskosität unvernetzt (mPa·s) | 40,000 |
| mixing ratio | 10 to 1 |
| Pot life (min) | 90 |
| Entformzeit (min) | 6 |
| Tensile strength (MPa) | 4 |
| Elongation at break (%) | 300 |
| Reißfestigkeit (N/mm) | 9 |
| keywords | |
|---|---|
| keywords | |
| Mechanical properties | |
|---|---|
| Shore A hardness | 40.0 Shore A |
| tensile strength | 4.0 MPa |
| elongation at break | 300.0 % |
| Tear resistance | 9.0 kN/m |
| Linear shrinkage | < 0.1% |
| processing | |
|---|---|
| Viscosity of the mixture | 15,000 mPa·s |
| Viscosity Comp. A | 40,000 mPa·s |
| Viscosity Comp. B | 500 mPa·s |
| Pot life at 23°C | 90.0 min |
| demolding time | 360.0 min |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 1.3 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 |