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Clear Potting Silicones for Electronics

Clear Potting Silicones for Electronics

Clear potting silicones are specialized encapsulants designed to protect sensitive electronic components, PCBs, LEDs, sensors, and power supplies while maintaining optical transparency. Their flexible, durable chemistry forms a reliable barrier against moisture, vibration, and contaminants—ideal where both protection and visibility are critical.

CHT’s line of clear potting silicones, distributed by Chemical Concepts, serves electronics, aerospace, LED lighting, transportation, and renewable energy. With easy 1:1 mix ratios and low viscosities for thorough coverage, these materials support consistent processing and long-term reliability.

Key Features & Benefits

  • Optically Clear Formulations – Maintain full visibility of encapsulated components for inspection or optical sensor applications.
  • Environmental Protection – Shield circuits from moisture, dust, and chemical exposure.
  • Thermal & Electrical Stability – Excellent dielectric strength; wide operating range (–55 °C to 204 °C).
  • Flexible & Low-Stress – Silicone chemistry reduces thermal expansion stress on components.
  • Primerless Adhesion Options – Strong bonding to plastics, metals, and glass.
  • UL 94 HB and Mil-Spec Grades – Meets demanding aerospace and electronics standards.

Common Applications

  • Printed Circuit Boards (PCBs): Moisture-resistant encapsulation for long-term reliability.
  • Aerospace & Defense: Protect avionics, navigation systems, and flight sensors in harsh conditions.
  • LED Lighting: Optically clear encapsulants enhance brightness and resist yellowing over time.
  • Power Supplies: Maintain insulation and mechanical stability under high voltage.
  • Sensors & Smart Devices: Preserve performance in miniaturized electronics and optical sensors.
  • Solar & Renewable Energy: UV-resistant protection for photovoltaic and junction box assemblies.
  • Automotive & Marine: Reliable protection from vibration, salt spray, and extreme temperatures.

Featured Products

Product Description / Benefits Mix Ratio Cure Type Color Viscosity (cps) Durometer (Shore A) Gel Time Tensile (psi) Elongation (%)
QSil 214 (Chem-Set 412 in cartridges) Fast room temp cure, UL 94 HB 1:1 Addition Transparent 4,900 40 28 min 650 150
QSil 209 Long work time, excellent adhesion 1:1 Addition Transparent 6,700 60 8–10 hrs 800 80
QSil 212 High durometer, excellent adhesion 1:1 Addition Transparent 6,500 60 60 min 1.25 120
QSil 217 Low viscosity, fast setting 1:1 Addition Clear 330 35 20 min 58 41
QSil 219 Meets Mil Spec Mil-I-81550C Type II 1:1 Addition Clear 3,700 40 5–8 hrs 750 100
QSil 223 UL 94 HB rated 1:1 Addition Clear 2,800 51 ~2 hrs 716 89
QSil 229 Primerless adhesion 1:1 Addition Clear to Cloudy 5,300 65 Heat cure only 400 100
QSil 229LV Primerless adhesion, low viscosity 1:1 Addition Clear to Cloudy 2,900 65 Heat cure only 300 100

Compliance & Certifications

  • UL 94 HB and V-0 rated materials available
  • MIL-I-81550C Type II compliant (QSil 219)
  • ISO 9001 manufacturing standards
  • ASTM-tested dielectric and volume resistivity properties

Compatible Substrates

  • PCB materials and solder masks
  • Metals (aluminum, steel, copper)
  • Plastics (polycarbonate, ABS, acrylic)
  • Glass and ceramic components

Packaging & Ordering

Available in dual cartridges, pint kits, gallon kits, pail kits, and drums for both manual and automated dispensing. Custom packaging available upon request.

Need help choosing a clear potting silicone?

We’ll recommend the right viscosity, gel time, and hardness for your assemblies—plus packaging that fits your process.

Clear Potting Silicones for Electronics

Clear potting silicones are specialized encapsulants designed to protect sensitive electronic components, PCBs, LEDs, sensors, and power supplies while maintaining optical transparency. Their flexible, durable chemistry forms a reliable barrier against moisture, vibration, and contaminants—ideal where both protection and visibility are critical.

CHT’s line of clear potting silicones, distributed by Chemical Concepts, serves electronics, aerospace, LED lighting, transportation, and renewable energy. With easy 1:1 mix ratios and low viscosities for thorough coverage, these materials support consistent processing and long-term reliability.

Key Features & Benefits

  • Optically Clear Formulations – Maintain full visibility of encapsulated components for inspection or optical sensor applications.
  • Environmental Protection – Shield circuits from moisture, dust, and chemical exposure.
  • Thermal & Electrical Stability – Excellent dielectric strength; wide operating range (–55 °C to 204 °C).
  • Flexible & Low-Stress – Silicone chemistry reduces thermal expansion stress on components.
  • Primerless Adhesion Options – Strong bonding to plastics, metals, and glass.
  • UL 94 HB and Mil-Spec Grades – Meets demanding aerospace and electronics standards.

Common Applications

  • Printed Circuit Boards (PCBs): Moisture-resistant encapsulation for long-term reliability.
  • Aerospace & Defense: Protect avionics, navigation systems, and flight sensors in harsh conditions.
  • LED Lighting: Optically clear encapsulants enhance brightness and resist yellowing over time.
  • Power Supplies: Maintain insulation and mechanical stability under high voltage.
  • Sensors & Smart Devices: Preserve performance in miniaturized electronics and optical sensors.
  • Solar & Renewable Energy: UV-resistant protection for photovoltaic and junction box assemblies.
  • Automotive & Marine: Reliable protection from vibration, salt spray, and extreme temperatures.

Featured Products

Product Description / Benefits Mix Ratio Cure Type Color Viscosity (cps) Durometer (Shore A) Gel Time Tensile (psi) Elongation (%)
QSil 214 (Chem-Set 412 in cartridges) Fast room temp cure, UL 94 HB 1:1 Addition Transparent 4,900 40 28 min 650 150
QSil 209 Long work time, excellent adhesion 1:1 Addition Transparent 6,700 60 8–10 hrs 800 80
QSil 212 High durometer, excellent adhesion 1:1 Addition Transparent 6,500 60 60 min 1.25 120
QSil 217 Low viscosity, fast setting 1:1 Addition Clear 330 35 20 min 58 41
QSil 219 Meets Mil Spec Mil-I-81550C Type II 1:1 Addition Clear 3,700 40 5–8 hrs 750 100
QSil 223 UL 94 HB rated 1:1 Addition Clear 2,800 51 ~2 hrs 716 89
QSil 229 Primerless adhesion 1:1 Addition Clear to Cloudy 5,300 65 Heat cure only 400 100
QSil 229LV Primerless adhesion, low viscosity 1:1 Addition Clear to Cloudy 2,900 65 Heat cure only 300 100

Compliance & Certifications

  • UL 94 HB and V-0 rated materials available
  • MIL-I-81550C Type II compliant (QSil 219)
  • ISO 9001 manufacturing standards
  • ASTM-tested dielectric and volume resistivity properties

Compatible Substrates

  • PCB materials and solder masks
  • Metals (aluminum, steel, copper)
  • Plastics (polycarbonate, ABS, acrylic)
  • Glass and ceramic components

Packaging & Ordering

Available in dual cartridges, pint kits, gallon kits, pail kits, and drums for both manual and automated dispensing. Custom packaging available upon request.

Need help choosing a clear potting silicone?

We’ll recommend the right viscosity, gel time, and hardness for your assemblies—plus packaging that fits your process.

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