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Two-part, addition-cure silicone elastomer system with controlled viscosity for precise dispensing and mold filling.
Excellent thermal stability and long-term performance across a wide temperature range (–60 °C to 200 °C).
Low compression set and high elasticity for reliable sealing and dynamic gasket applications.
UL 94 HB rated for flammability compliance in electrical and electronic enclosures.
Low volatility and minimal outgassing—suitable for sensitive optical and vacuum environments.
Sealing and encapsulation of automotive sensors and power electronics modules.
Dynamic gasketing for industrial control housings exposed to vibration and thermal cycling.
Protective potting of LED drivers and power converters in outdoor lighting systems.
Soft-touch overmolding on medical device housings requiring biocompatibility support (ISO 10993 tested).
Thermal interface material (TIM) bonding layer in hybrid power modules.
| Chemical Type | Platinum-catalyzed addition-cure silicone elastomer |
| Product Form | Two-component kit (Part A: base; Part B: catalyst) |
| Appearance | Part A: translucent viscous liquid; Part B: translucent viscous liquid |
| Mix Ratio (by weight) | 10:1 (A:B) |
| Cure Condition | RT cure (24 h) or accelerated cure (100 °C for 30 min) |
| Hardness (Shore A) | 40 ± 5 |
| Tensile Strength | 5.5 MPa (ASTM D412) |
| Elongation at Break | 280% (ASTM D412) |
Q1: What is the primary function of the DOWSIL SE 4447 CV Kit in silicone elastomer formulations?
A: The DOWSIL SE 4447 CV Kit is a platinum-catalyzed addition-cure system designed to provide consistent, room-temperature or low-heat vulcanization for high-performance silicone elastomers. It enables precise control over cure kinetics and supports excellent mechanical properties, clarity, and thermal stability in the final cured product.
Q2: Can this kit be used with standard HTV or LSR base polymers?
A: Yes — the DOWSIL SE 4447 CV Kit is formulated for compatibility with a broad range of vinyl-terminated polydimethylsiloxane (PDMS) polymers, including both high-consistency vinyl-containing HTV gums and liquid vinyl-functional LSR bases. Compatibility testing under actual processing conditions is recommended to confirm optimal dispersion and cure behavior.
Q3: How should the kit be stored to maintain its activity and shelf life?
A: Store unopened containers in a cool, dry place below 25 °C, away from direct sunlight and sources of heat or moisture. Once opened, minimize exposure to air and moisture, and reseal tightly after each use. Under proper storage conditions, the kit typically maintains performance stability for up to 12 months from date of manufacture.
Q4: Does the kit contain inhibitors, and how does that affect processing flexibility?
A: Yes — the kit includes controlled inhibition to provide adequate pot life at ambient temperatures while enabling reliable, rapid cure upon heating. This allows for extended mixing and molding windows followed by efficient, predictable crosslinking during post-cure, supporting both batch and continuous production methods.
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E-mail: wangxingqiang@ericwchem.com
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Building A1, Jiete Industrial Park, Huangpu District, Guangzhou City, Guangdong Province, China
