Products

SYLGARD™ 527 Silicone Dielectric Gel

  • Technology: Two-part silicone dielectric gel
  • Brand Name: SYLGARD™ 527 Silicone Dielectric Gel
  • Manufacturer: Dow
  • Package Size: Contact Avantek for details.
  • Shelf Life: Contact Avantek for details.

1. Product Overview

SYLGARD™ 527 Silicone Dielectric Gel is a two-part, 1:1 mix ratio silicone gel designed for sealing and protecting PCB system assemblies, particularly those with delicate components. It offers low viscosity for good flow, room temperature or heat-accelerated curing, and availability in clear or red color. This gel provides excellent dielectric properties, stress relief, and self-healing characteristics after curing.


2. Applications

  • Sealing and protecting PCB assemblies, especially with delicate components
  • Electrical insulation for high-voltage applications
  • Moisture and contaminant isolation
  • Stress relief for circuits and interconnections against thermal and mechanical stress
  • Encapsulation of optoelectronics due to its stress-relieving properties and high refractive index

3. Typical Properties

Before Mixing (Uncured Components)

Property Unit Part A Part B
Color – Clear or Red Clear or Red
Viscosity cP 470 454
Specific Gravity – 0.95 0.95

After Mixing (Uncured Gel)

Property Unit Value
Viscosity (Mixed) cP 465
Specific Gravity – 0.95
Working Time (Pot Life) at 25°C hr 1.98
Heat Cure Time (T90) at 100°C min 210
Heat Cure Time (T90) at 125°C min 75
Heat Cure Time (T90) at 150°C min 35

Cured Properties

Property Unit Value
Gel Hardness grams 113
Penetration (¼ cone) mm/10 55
Dielectric Strength V/mil (kV/mm) 425 (17)
Dielectric Constant at 100 Hz – 2.85
Dielectric Constant at 100 kHz – 2.85
Volume Resistivity ohm·cm 2.75 × 10¹⁵
Dissipation Factor at 100 Hz – 0.002
Dissipation Factor at 100 kHz – 0.0001
Linear Coefficient of Thermal Expansion (CTE) ppm/°C 335
Operating Temperature Range °C -45 to 150

Everwide FX244-1: High Performance for Precision Molding

FX244-1 A specialized two-part silicone rubber designed for creating high-precision molds. This material features a unique oil-bleeding property that creates a self-releasing surface, eliminating the need for external non-stick sprays during demolding.

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