Item Name: SYLGARD™ 170 Silicone Elastomer
Manufacturer: The Dow Chemical Company
Technologies: Polydimethylsiloxane elastomer, two-part 1:1 mix ratio
Color: Part A – Black, Part B – Black
Cure Type: Room temperature or heat accelerated cure
Package Size: Contact to Techniq VN for details
Shelf Life: Contact to Techniq VN for detail
SYLGARD™ 170 is a two-part, black silicone elastomer supplied in a 1:1 mix ratio. It exhibits low viscosity, long working time, and versatile cure options at room temperature or with heat. The material provides moderate thermal conductivity, stress relief during thermal cycling, and flame resistance, meeting UL 94 V-0 and MIL-PRF-23586F standards for specific applications. It is approved for railway standards EN45545-2 (HL3). The elastomer cures without exotherm and requires no post-cure, allowing immediate use after processing. Its flowable nature ensures effective filling in narrow or complex geometries.
Encapsulant or potting material for electrical/electronic assemblies
Power supplies and transformers
Connectors and sensors
Industrial controls and relays
Amplifiers
High voltage resistor packs
| Property | Unit | Result |
|---|---|---|
| Mix Ratio | – | 1:1 |
| Color (Part A) | – | Black |
| Viscosity (Part A) | cP / Pa·s | 3160 / 3.1 |
| Viscosity (Part B) | cP / Pa·s | 1110 / 1.1 |
| Specific Gravity (Part A) | – | 1.37 |
| Specific Gravity (Part B) | – | 1.37 |
| Property | Unit | Result |
|---|---|---|
| Viscosity (Mixed) | cP / Pa·s | 2135 / 2.1 |
| Thermal Conductivity | btu/hr·ft·°F / W/m·K | 0.277 / 0.48 |
| Working Time at 25°C | minutes | 15 |
| Cure Time at 25°C | hours | 24 |
| Heat Cure Time at 70°C | minutes | 25 |
| Heat Cure Time at 100°C | minutes | 10 |
| Durometer Shore A | – | 47 |
| Dielectric Strength | volts/mil / kV/mm | 472 / 18 |
| Volume Resistivity | ohm·cm | 5.6×10¹⁷ |
| Dielectric Constant at 100 Hz | – | 2.54 |
| Dielectric Constant at 100 kHz | – | 2.50 |
| Dissipation Factor at 100 Hz | – | 0.002 |
| Dissipation Factor at 100 kHz | – | 0.0002 |
| Linear CTE (by TMA) | ppm/°C | 275 |
| EN 45545-2 Certifications | – | R22–R23–R24–R25–R26 HL3 |
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