Silicones, silicone oils, sprays
Casting and potting resins
BLUESIL RTV 3330 SPU 25 kg
Base component of a condensation-curing RTV-2 silicone elastomer for mold making; processing with BLUESIL CATA SPU in a 100:5 ratio by weight; for casting molds for PU serial parts,
Shore A 30 after 96 h; base viscosity 35,000 mPa·s; pot life 150 min
2K-Sn-Silicone (Shore A 30, white) — the medium-hard variant of the RTV-3318/3330/3335-SPU family for PU casting resin series production
Documents
Internal reference:
40-3330SPU.KE.K025
HS code:
39100000
Condensation-curing mold-making silicone, specifically for molds used in the serial casting of polyurethane resins. Medium hardness of 30 Shore A.
BLUESIL RTV 3330 SPU is a silicone elastomer that cures at room temperature via condensation curing after the addition of the catalyst BLUESIL CATA SPU, forming a flexible, elastic material. It is specifically designed for molds used in the serial casting of polyurethane resins and is also suitable for molds used to cast wax, plaster, or other impression materials. RTV 3330 SPU is the medium hardness in the series, with a Shore A hardness of 30. Mixing ratio: 100 parts base to 5 parts CATA SPU.
According to TDS, it offers very high resistance to polyurethane resins, even those with strongly exothermic curing. The series is available in three hardnesses: 18, 30, and 35 Shore A. RTV 3330 SPU, with 30 Shore A, is in the middle range and is more resistant to sagging than the softer type 3318 SPU.
What distinguishes the RTV 3330 SPU
What is the RTV 3330 SPU used for?
Processing
Important Notes
- Processing is dependent on temperature and humidity. Higher temperature or humidity shortens the pot life. Do not expose the catalyzed product to temperatures above 50 °C during and after curing.
- Store in the original container below 40 °C for up to 12 months from the date of manufacture. Reseal opened containers.
- The currently valid Elkem data sheet (TDS and SDS) is authoritative, which we will be happy to send you.
Technical data for BLUESIL RTV 3330 SPU 25 kg
| Product Information | |
|---|---|
| Brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Curing type | Condensation (tin) |
| Container | 20 kg |
| Number of components | 2K (two-component) |
| Consistency | Flowable |
| Mixing Ratio | 100:5 |
| Further Properties | |
|---|---|
| UV resistance | No |
| Physical Properties | |
|---|---|
| Cured Color | White |
| Self-leveling | Yes |
| Density (g/cm³) | 1.25 |
| Uncrosslinked viscosity (mPa·s) | 25 |
| Electrical Properties | |
|---|---|
| Electrical Insulation | No |
| Curing values | |
|---|---|
| Pot life (min) | 150 |
| Demolding time (min) | 24 |
| Product Approvals | |
|---|---|
| Food contact | No |
| Medical grade | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 2.5 |
| Elongation at break (%) | 350 |
| Tear strength (N/mm) | 12 |
Please refer to the technical data sheet (TDS) in the "Documents" tab for binding values.
Documents and data sheets
Click on a document for the preview or the download icon for direct download.
Technical Data Sheets (TDS) 2
Frequently asked questions about RTV 3330 SPU
Practical application and design questions, answered by SILITECH.
The hardness: 3330 SPU has a Shore A hardness of 30, 3318 SPU a Shore A hardness of 18. 3330 SPU also offers slightly higher tensile and tear strength.
For molds for serial casting of polyurethane resins, even with highly exothermic curing, as well as for wax, plaster and other molding materials.
100 parts base with 5 parts BLUESIL CATA SPU. Pot life approximately 150 min, demolding after 24 h at 23 °C and 50% RH.
Tensile strength approximately 3.0 MPa, elongation at break approximately 350%, tear strength approximately 15 kN/m (according to ASTM D412 / D624).
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Product Specifications
| Product Information | |
|---|---|
| Brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Curing type | Condensation (tin) |
| Container | 20 kg |
| Number of components | 2K (two-component) |
| Consistency | Flowable |
| Mixing Ratio | 100:5 |
| Further Properties | |
|---|---|
| UV resistance | No |
| Physical Properties | |
|---|---|
| Cured Color | White |
| Self-leveling | Yes |
| Density (g/cm³) | 1.25 |
| Uncrosslinked viscosity (mPa·s) | 25 |
| Electrical Properties | |
|---|---|
| Electrical Insulation | No |
| Curing values | |
|---|---|
| Pot life (min) | 150 |
| Demolding time (min) | 24 |
| Product Approvals | |
|---|---|
| Food contact | No |
| Medical grade | No |
| Mechanical properties | |
|---|---|
| Tensile strength (MPa) | 2.5 |
| Elongation at break (%) | 350 |
| Tear strength (N/mm) | 12 |
| Keywords | |
|---|---|
| Keywords | |
| Mechanical properties | |
|---|---|
| Shore hardness A | 30.0 Shore A |
| Tensile Strength | 3.0 MPa |
| Elongation at break | 350.0 % |
| Tear resistance | 15.0 kN/m |
| Processing | |
|---|---|
| Viscosity Comp. A | 35,000 mPa·s |
| Pot life at 23°C | 150.0 min |
| Demolding time | 1440.0 min |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 1.25 g/cm³ |
| Temperature Resistance (Continuous) | -50 to 200 °C |
| Peak Temperature (Short-term) | 250 °C |
| Storage | |
|---|---|
| Shelf life in original packaging | 12 months |
| Storage Temperature | -5 to 30 °C |
Documents and data sheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) for download: