Guangzhou Eric Wei Chemical Co., Ltd.
Guangzhou Eric Wei Chemical Co., Ltd.

Dow SYLGARD 527 A&B Silicone Dielectric Gel

Dow SYLGARD 527 A&B Silicone Dielectric Gel is a two-part, platinum-cured silicone elastomer offering ultra-low modulus, excellent thermal stability (−65°C to 200°C), and outstanding dielectric insulation. It cures to a soft, conformal gel ideal for protecting sensitive electronics, potting sensors, and filling air gaps in high-voltage applications while maintaining long-term reliability and minimal stress on components.
  • dow sylgard 527 a b silicone dielectric gel_4bce336b
  • dow sylgard 527 a b silicone dielectric gel_4bce336b

Features Of Dow SYLGARD 527 A&B Silicone Dielectric Gel

  1. Ultra-low modulus formulation enables conformal stress relief for sensitive electronic components.

  2. Excellent dielectric strength and volume resistivity ensure reliable electrical insulation under high-voltage conditions.

  3. Thermally stable across –50 °C to +200 °C, maintaining integrity during thermal cycling and power-on operation.

  4. Non-corrosive and halogen-free, compatible with copper, aluminum, gold, and common PCB substrates.

  5. Two-part, platinum-catalyzed system with low mixed viscosity for easy dispensing and void-free encapsulation.

Typical Applications Of Dow SYLGARD 527 A&B Silicone Dielectric Gel

  1. High-voltage battery module potting and cell-to-cell gap filling in electric vehicles (EVs).

  2. Insulating gel for power electronics, including IGBT modules, inverters, and DC–DC converters.

  3. Thermal interface and dielectric protection in LED lighting arrays and solid-state lighting drivers.

  4. Encapsulation of sensors, transformers, and high-frequency RF components requiring EMI suppression and moisture resistance.

  5. Underfill and edge bonding for flexible printed circuits (FPCs) and automotive ADAS radar assemblies.

Specifications Of Dow SYLGARD 527 A&B Silicone Dielectric Gel

Chemical TypePlatinum-catalyzed addition-cure silicone elastomer
Product FormTwo-component liquid (Part A: base; Part B: catalyst)
AppearanceTranslucent, low-viscosity liquid (both parts)
Mix Ratio by Weight1:1 (A:B)
Cure TemperatureRoom temperature (accelerated at 60–80 °C)
Density (25 °C)Approx. 1.12 g/cm³ (mixed)
Dielectric Strength≥ 20 kV/mm (per ASTM D149)
Volume Resistivity≥ 1 × 10¹⁵ Ω·cm (per ASTM D257)


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