Item Name: DOWSIL™ TC-4530 CV Thermally Conductive Gap Filler
Manufacturer: Dow
Technologies: Two-part thermally conductive silicone with platinum cure system
Color: Part A – White; Part B – Blue
Cure Type: Room temperature or heat-accelerated cure
Package Size: Contact to Techniq VN for details.
Shelf Life: 6 months
DOWSIL™ TC-4530 CV is a two-part silicone-based thermally conductive gap filler with a thermal conductivity of 3.0 W/m·K. It cures at room temperature or with heat acceleration, producing a soft, compressible elastomer with low density (2.6 g/cm³), low abrasion, and high flow for smooth dispensing. Designed with a platinum-cure system and treated ceramic fillers, it ensures reliable long-term performance under temperature and humidity cycling. The product offers controlled silicone volatility, UL 94 V0 flammability rating, and excellent dielectric insulation, making it suitable for high-reliability automotive electronics.
Thermal management in engine and transmission control units
Heat dissipation from PCB-mounted modules to housing heat sinks
Automotive and consumer electronics requiring stable long-term performance
Automated dispensing lines with meter-mix equipment integration
| Property | Condition | Value |
|---|---|---|
| Part Type | – | Two-part (A+B, 1:1 mix) |
| Color | Part A: White / Part B: Blue | |
| Viscosity | Part A / Part B | 50 / 50 Pa·s |
| Thixotropic Index | Mixed | 5 |
| Density | Cured (25°C) | 2.6 g/cm³ |
| Thermal Conductivity | 25°C | 3.0 W/m·K |
| Working Time | 25°C | 60 min |
| Cure Time | 25°C / 50°C / 80°C | 18 h / 2 h / 1 h |
| Hardness | Shore 00 | 65 |
| Lap Shear Strength | Al/Al | 0.13 MPa |
| Volume Resistivity | – | 1.9 × 10¹⁴ Ω·cm |
| Dielectric Strength | – | 8 kV/mm |
| Dielectric Constant / Dissipation Factor | 1 MHz | 4.78 / 0.012 |
| Cyclosiloxane Content (D4–D10) | – | < 100 ppm |
| Outgassing (TML / CVCM) | – | 0.14% / 0.06% |
| Minimum BLT | – | < 200 µm |
| Flammability | UL 94 | V-0 |
| Shelf Life | 25°C | 6 months |
| Operating Temp. Range | – | -45 to 125°C (up to 200°C short term) |
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