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CAF 33 Black
Black 1K silicone sealant for industrial and automotive applications with a dark appearance.
Black 1K silicone sealant (acetic) for industrial and automotive applications with a dark appearance
Documents
HS code:
39100000
CAF 33 Black is a black 1K silicone sealant (acetic) for industrial and automotive applications with a dark appearance.
The Elkem CAF range comprises one-component (1K), moisture-curing silicone sealants – ready-to-use from the cartridge, with high temperature and chemical resistance. CAF 33 Black is tailored to specific industrial applications – its key properties and areas of use are listed below.
CAF 33 Black is the dark variant of the CAF-33 series — proven in automotive, household appliances, aviation and industry, where a black sealant joint is aesthetically or technically desirable.
What distinguishes CAF 33 Black
What is CAF 33 Black used for?
processing
Recommended accessories
Important instructions
CAF 33 Black compared to related CAF products
Networking, mechanics, and temperature directly next to each other — all values from the official Elkem TDS. “— " = not specified in the datasheet.
CAF 33 Black Current product |
CAF 33 White → | CAF 33 Transparent → | CAF 30 White → | |
|---|---|---|---|---|
| Networking system | 1K Acetic | 1K Acetic | 1K Acetic | 1K Acetic |
| Color | Black | White | Transparent | White |
| Shore A hardness | 25 | 25 | 25 | 20 |
| Elongation at break | 500 % | 500 % | 500 % | 500 % |
| Tensile strength | 2.5 MPa | 2.5 MPa | 2.5 MPa | 2.2 MPa |
| Tear resistance | 5.4 kN/m | 5.4 kN/m | 5.4 kN/m | 5.0 kN/m |
| Skin formation time | 6 min | 6 min | 6 min | 6 min |
| Continuous operating temperature. | +250 °C | +250 °C | +250 °C | +250 °C |
| Peak temperature | +300 °C | +300 °C | +300 °C | +250 °C |
| Main application | Automotive in-situ seals | Automotive seals | Visible glass bonding | Railway vehicle seals |
Technical specifications for CAF 33 Black
| Product information | |
|---|---|
| brand | CAF |
| Networking type | Single-component (humidity) |
| Container | 100 g, 310 ml, 25 kg |
| Number of components | 1K (single-component) |
| consistency | Thixotropic |
| Mixing ratio | Single-component |
| Manufacturer | Elkem Silicones |
| Other features | |
|---|---|
| UV resistance | No |
| Physical properties | |
|---|---|
| Paint has hardened | Black |
| Self-leveling | No |
| Electrical properties | |
|---|---|
| Electrical insulation | Yes |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
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 CAF 33 Black
Practical application and design questions — answered by SILITECH.
CAF 33 Black: Black 1K silicone sealant (acetic) for industrial and automotive applications with a dark appearance. Main applications include automotive in-situ sealing, sunroof bonding, and household appliances.
Acetic cure (acetic acid crosslinking) means that the 1K system crosslinks through atmospheric moisture and releases small amounts of acetic acid during curing—recognizable by its characteristic odor. Acetic systems are established, economical industry standards with excellent adhesion to glass, ceramics, and many metals. Caution: Acetic acid can cause corrosion on copper, zinc, and electroplated steels—use a neutral variant (e.g., CAF 530, CAF 731, or CAF 730) for these materials.
CAF 33 Black adheres without primer to glass, ceramics, many metals (stainless steel, aluminum, copper in neutral variants), and numerous engineering plastics. Adhesion is not possible to PE, PP, PTFE, and silicone oils—these substrates are fundamentally incompatible with silicone. If in doubt, we recommend a preliminary test or consulting SILITECH regarding the specific material pairing.
Prepare the substrate to be clean, grease-free, and dry. Apply the sealant evenly from the cartridge or container—refer to the TDS for skin formation and curing times. Store in the unopened original container at 5 to 30 °C, protected from sunlight. Use opened containers promptly—for Acetic systems, reseal tightly immediately after opening. Consult the current Safety Data Sheet (SDS) before use.
In the comparison table above, you will find related CAF products with adapted properties—different color, different crosslinking system (acetic vs. neutral), or different mechanical properties. If you are unsure about the optimal choice, we would be happy to advise you—contact SILITECH with your requirements (substrate pairing, temperature, corrosion requirements, appearance).
Your question isn't listed here
Our technical team will advise you personally on material selection, processing questions, and individual requirements. Quickly and competently.
Product specifications
| Product information | |
|---|---|
| Container | 100 g or 310 ml or 25 kg |
| brand | CAF |
| Networking type | Single-component (humidity) |
| Number of components | 1K (single-component) |
| consistency | Thixotropic |
| Mixing ratio | Single-component |
| Manufacturer | Elkem Silicones |
| Other features | |
|---|---|
| UV resistance | No |
| Physical properties | |
|---|---|
| Paint has hardened | Black |
| Self-leveling | No |
| Electrical properties | |
|---|---|
| Electrical insulation | Yes |
| Product approvals | |
|---|---|
| Food contact | No |
| Suitable for medical use | No |
| Keywords | |
|---|---|
| Keywords | |
| Mechanical properties | |
|---|---|
| Shore hardness A | 25.0 Shore A |
| Modulus at 100% elongation | 0.6 MPa |
| Tensile strength | 2.5 MPa |
| Elongation at break | 500.0 % |
| Tear resistance | 5.4 kN/m |
| Compression deformation residue | 54.0 % |
| processing | |
|---|---|
| Skin formation time | 6.0 min |
| Fully cured after 24 hours | 4.3 mm |
| Crosslinking 2 mm layer | 6.0 h |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 1.05 g/cm³ |
| Temperature resistance (duration) | -65 to 250 °C |
| Peak temperature (short-term) | 300 °C |
| thermal conductivity | 0.2 W/(m·K) |
| Electrical characteristics | |
|---|---|
| Dielectric constant ε (1 kHz) | 2.8 |
| Dielectric strength | 19.0 kV/mm |
| Contact resistance | 1e+14 Ω·cm |
| Loss factor tan δ | 0.002 |
| storage | |
|---|---|
| Shelf life in original packaging | 24 months |
| Storage temperature | 2 to 30 °C |
Documents and datasheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) are available for download:
- CAF 33 Black - Fiche Technique FR.pdf (88 KB)
- CAF 33 Black - Fiche de Sécurité FR.pdf (358 KB)
- CAF 33 Black - Safety Data Sheet EN.pdf (399 KB)
- CAF 33 Black - Scheda di Sicurezza IT.pdf (345 KB)
- CAF 33 Black - Safety Data Sheet DE.pdf (312 KB)
- CAF 33 Black - Technical Data Sheet EN.pdf (705 KB)
- CAF 33 Black - Technical Data Sheet DE.pdf (215 KB)