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BLUESIL RTV 3318 SPU
Condensation-curing RTV-2 silicone, mixing ratio 20:1, Shore A 18. Mold-making silicone specifically for molds for serial casting of polyurethane resins, also for wax and plaster; very high resistance to exothermically curing PU resins.
2K-Sn silicone (Shore A 18, soft) specifically for polyurethane casting resin molds — mass production of PU components with long mold life
Documents
HS Code:
39100000
Condensation-curing mold-making silicone, specifically for molds used in the serial casting of polyurethane resins. Soft type with a Shore A hardness of 18.
BLUESIL RTV 3318 SPU is a silicone elastomer that cures at room temperature via condensation curing after the addition of the BLUESIL CATA SPU catalyst, 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 3318 SPU is the softest type in the series, with a hardness of 18 Shore A. 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 3318 SPU, at 18 Shore A, is the softest type.
What distinguishes the RTV 3318 SPU
What is the RTV 3318 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 3318 SPU
| Product Information | |
|---|---|
| Brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Curing type | Condensation (tin) |
| Container | 1 kg, 5 kg, 20 kg, 200 kg |
| Number of components | 2K (two-component) |
| Consistency | Flowable |
| Mixing Ratio | 100:5 |
| Further Properties | |
|---|---|
| UV resistance | No |
| Physical Properties | |
|---|---|
| Cured Color | Beige |
| 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) 3
Frequently asked questions about RTV 3318 SPU
Practical application and design questions, answered by SILITECH.
For molds for serial casting of polyurethane resins, even with highly exothermic curing, as well as for wax, plaster and other molding materials.
18 Shore A after 96 h, the softest of the three series hardnesses (18 / 30 / 35 Shore A).
100 parts base with 5 parts BLUESIL CATA SPU. Pot life approximately 150 min, demolding after 24 h at 23 °C and 50% RH.
According to TDS, very high resistance to polyurethane resins, even to strongly exothermic curing systems.
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Product Specifications
| Product Information | |
|---|---|
| Container | 1kg or 5kg or 20kg or 200kg |
| Brand | Bluesil |
| Manufacturer | Elkem Silicones |
| Curing type | Condensation (tin) |
| Number of components | 2K (two-component) |
| Consistency | Flowable |
| Mixing Ratio | 100:5 |
| Further Properties | |
|---|---|
| UV resistance | No |
| Physical Properties | |
|---|---|
| Cured Color | Beige |
| 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 | 18.0 Shore A |
| Tensile Strength | 2.5 MPa |
| Elongation at break | 350.0 % |
| Tear resistance | 12.0 kN/m |
| Processing | |
|---|---|
| Viscosity Comp. A | 25’000 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:
- Bluesil RTV 3318 SPU - Fiche Technique FR.pdf (180 KB)
- Bluesil RTV 3318 SPU - Fiche de Sécurité FR.pdf (499 KB)
- Bluesil RTV 3318 SPU - Scheda di Sicurezza IT.pdf (492 KB)
- Bluesil RTV 3318 SPU - Safety Data Sheet DE.pdf (296 KB)
- Bluesil RTV 3318 SPU - Technical Data Sheet EN.pdf (457 KB)
- Bluesil RTV 3318 SPU - Technical Data Sheet DE.pdf (173 KB)