Description
QSil 214 from CHT is a transparent, colorless, two-component silicone potting compound designed for electrical insulation and environmental protection in sensitive electronic and optical assemblies. With a 1:1 mix ratio and fast room-temperature cure, QSil 214 simplifies encapsulation while providing hydrolytic stability and excellent resistance to thermal shock and reversion.
Its medium viscosity and Newtonian flow properties make it ideal for filling intricate geometries, potting LED assemblies, and sealing delicate components that require optical clarity and flexibility.
Key Features & Benefits
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Crystal-clear, colorless finish
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1:1 mix ratio (by weight)
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Medium viscosity for excellent flow
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Room temperature or heat-cured (RTV or oven-cured)
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Low linear shrinkage for dimensional stability
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UL Recognized: File No. QMFZ2.E205830
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Outstanding hydrolytic stability and reversion resistance
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Electrical insulation with physical shock resistance
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Compatible with primers for enhanced adhesion
Common Applications
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Potting and encapsulating electronic components
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Optical assemblies and LED potting
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Sensors and PCB protection
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Harsh environment electrical protection
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Applications requiring transparency and electrical insulation
Technical Specifications
| Property | Value |
|---|---|
| Mix Ratio (by weight) | 1:1 |
| Cure Type | Addition |
| Gel Time @ 25°C | 30 minutes |
| Viscosity A & B | 6,000 cP |
| Specific Gravity A & B | 1.00 |
| Hardness (Shore A) | 40 (ASTM D2240) |
| Elongation at Break | 100% (ISO 37) |
| Tensile Strength | 600 psi (4.14 N/mm²) |
| Dielectric Strength | 500 V/mil |
| Thermal Conductivity | 0.18 W/m·K |
| Operating Temperature Range | -55°C to +204°C (-67°F to 399°F) |
| Refractive Index | 1.4 |
| Linear CTE | 308 ppm/°C |
| UL File Number | QMFZ2.E205830 |
| Shelf Life | 24 months |
| Max Storage Temperature | 100°F (38°C) |
✅ Compliance & Certifications
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UL Recognized under File No. QMFZ2.E205830
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RoHS compliant
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Meets electrical insulation and environmental protection standards for encapsulants
🧱 Compatible Substrates
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PCB and electronic assemblies
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Plastics (test for compatibility)
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Metals (with appropriate primer)
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Glass
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Optical sensors
📦 Packaging & Ordering Info
| Size | Mix Ratio | Weight |
|---|---|---|
| 50ml Dual Cartridge | 1:1 | 50 grams |
| 1 Gallon Kit | 1:1 | 8 lbs |
| 5 Gallon Pail Kit | 1:1 | 80 lbs |
| 55 Gallon Drum Kit | 1:1 | 800 lbs |
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Custom packaging options available upon request
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For best adhesion, CHT primer is recommended
📞 Ready to Order or Have Questions?
Our team of silicone potting experts is ready to help.
Call 800-220-1966 or email [email protected] for bulk pricing, technical support, or help selecting primers.
Looking for more potting and encapsulating silicones?
Explore our full Potting Silicone Collection.
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