Products

SYLGARD™ 170 Silicone Elastomer

  • Technology: Silicone encapsulant
  • Brand Name: SYLGARD™ 170 Silicone Elastomer
  • Manufacturer: Dow
  • Package Size: Contact Avantek for details.
  • Shelf Life: Contact Avantek for details.

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1. Product Overview

SYLGARD™ 170 is a two-part, 1:1 mix ratio, black silicone elastomer designed for general-purpose encapsulation and potting applications. It offers:

  • Low viscosity for easy flow and filling of narrow spaces.
  • Long working time with room-temperature or heat-accelerated curing.
  • Moderate thermal conductivity for heat dissipation.
  • UL 94 V-0 flame resistance and compliance with MIL-PRF-23586F and EN 45545-2 HL3 (R22–R26) railway standards.
  • Enhanced stress relief, reducing damage from thermal cycling compared to rigid encapsulants.
  • Excellent electrical insulation properties for protection of sensitive electronic components.

2. Applications

SYLGARD™ 170 is suitable for encapsulation or potting in:

  • Power supplies
  • Connectors
  • Sensors
  • Industrial controls
  • Transformers
  • Amplifiers
  • High voltage resistor packs
  • Relays

3. Typical Properties

Unmixed Components

Property Unit Part A (Base) Part B (Curing Agent) Mixed
Color Black Black
Viscosity cP 3,160 1,110 2,135
Pa·s 3.1 1.1 2.1
Specific Gravity 1.37 1.37
Mix Ratio 1:1 1:1
Working Time (Pot Life, 25°C) minutes 15

Cured Properties

Property Unit Result
Cure Time (Room Temp, 25°C) hours 24
Heat Cure Time (70°C) minutes 25
Heat Cure Time (100°C) minutes 10
Hardness (Shore A) 47
Thermal Conductivity W/m·K 0.48
Dielectric Strength kV/mm 18
Volume Resistivity ohm·cm 5.6 × 10¹⁷
Dielectric Constant (100 Hz) 2.54
Dielectric Constant (100 kHz) 2.50
Dissipation Factor (100 Hz) 0.002
Dissipation Factor (100 kHz) 0.0002
Linear Coefficient of Thermal Expansion (CTE) ppm/°C 275
Operational Temperature Range °C -45 to 200

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