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CAF 4
Industrial sealing, bonding and coating: Bonding of plastics in aviation, electrical insulation, coating of fabrics for heat protection, coating of conveyor belts.
Elkem's CAF 4 is a self-leveling, off-white, one-component, acetic acid-curing silicone rubber. It is used for sealing, bonding, and coating in industrial applications, including bonding plastics in the aerospace industry, electrical insulation, and coating fabrics for thermal insulation and conveyor belts. CAF 4 cures rapidly and offers excellent mechanical properties, good heat resistance, and high dielectric performance, even when joining materials subjected to different thermal stresses.
Documents
HS Code:
39100000
CAF 4: One-component acetate-crosslinking silicone elastomer, self-leveling, off-white.
CAF 4 belongs to the Elkem CAF series of one-component, moisture-curing silicones. Technology: Acetate (acetic acid curing, 1K). Sales segment: Aerospace (distribution segment, no certification).
One-component acetate-crosslinking silicone elastomer, self-leveling, off-white.
What makes CAF 4 stand out
What is CAF 4 used for?
Processing
Important Notes
- The currently valid Elkem data sheet (TDS and SDS) is authoritative, which we will be happy to send you.
- Cross-linked by humidity; reseal opened containers tightly.
CAF 4 in comparison
CAF 4 Current Product | CAF 3 → | CAF 1 → | CAF 730 MF → | |
|---|---|---|---|---|
| Crosslinking | Acetate | Acetate | Acetate | Neutral |
| Color | Broken white | translucent | red | translucent |
| Shore A | 37 | 26 | 47 | 24 |
| Duration °C | +225 | +200 | +225 | +200 |
Technical data for CAF 4
| Product Information | |
|---|---|
| Brand | CAF |
| Manufacturer | Elkem Silicones |
| Curing type | One-component (moisture curing) |
| Number of components | 1K (one-component) |
| Consistency | Flowable |
| Mixing Ratio | One-component |
| Container | 100 g, 310 ml |
| Further Properties | |
|---|---|
| UV resistance | No |
| Physical Properties | |
|---|---|
| Cured Color | White |
| Self-leveling | Yes |
| Electrical Properties | |
|---|---|
| Electrical Insulation | Yes |
| Product Approvals | |
|---|---|
| Food contact | No |
| Medical grade | No |
Please refer to the technical data sheet (TDS) in the "Documents" tab for binding values.
Frequently Asked Questions about CAF 4
Practical application and design questions — answered by SILITECH.
CAF 4 is suitable for bonding plastics in aviation, electrical insulation, and fabric coating for heat protection.
CAF 4: Acetate (acetic acid crosslinking, 1K).
Continuous use according to Elkem data sheet -60 to 225 degrees C.
Your question not covered?
Our technical team provides personal advice on material selection, processing questions, and individual requirements. Fast and competent.
Product Specifications
| Product Information | |
|---|---|
| Container | 100 g or 310 ml |
| Brand | CAF |
| Manufacturer | Elkem Silicones |
| Curing type | One-component (moisture curing) |
| Number of components | 1K (one-component) |
| Consistency | Flowable |
| Mixing Ratio | One-component |
| Further Properties | |
|---|---|
| UV resistance | No |
| Physical Properties | |
|---|---|
| Cured Color | White |
| Self-leveling | Yes |
| Electrical Properties | |
|---|---|
| Electrical Insulation | Yes |
| Product Approvals | |
|---|---|
| Food contact | No |
| Medical grade | No |
| Keywords | |
|---|---|
| Keywords | |
| Mechanical properties | |
|---|---|
| Shore hardness A | 37.0 Shore A |
| Modulus at 100% Elongation | 0.8 MPa |
| Tensile Strength | 3.8 MPa |
| Elongation at break | 290.0 % |
| Tear resistance | 4.5 kN/m |
| Processing | |
|---|---|
| Viscosity of Mixture | 250,000 mPa·s |
| Flowability | 4.0 min |
| Skin formation time | 10.0 min |
| Fully cured after 24 hours | 4.5 mm |
| Crosslinking 2 mm layer | 5.0 h |
| Physical & Thermal | |
|---|---|
| Density (23°C) | 1.19 g/cm³ |
| Temperature Resistance (Continuous) | -60 to 225 °C |
| Peak Temperature (Short-term) | 250 °C |
| Thermal conductivity | 0.3 W/(m·K) |
| Electrical characteristics | |
|---|---|
| Dielectric constant ε (1 kHz) | 2.9 |
| Dielectric strength | 21.0 kV/mm |
| Volume resistivity | 1e+15 Ω·cm |
| Dissipation factor tan δ | 0.002 |
| Storage | |
|---|---|
| Shelf life in original packaging | 24 months |
| Storage Temperature | 2 to 30 °C |
Documents and data sheets
Safety Data Sheets (SDS) and Technical Data Sheets (TDS) for download: