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DOWSIL™ TC-6020 Thermally Conductive Encapsulant

DOWSIL™ TC-6020 Thermally Conductive Encapsulant is a two‑part, heat‑cure silicone encapsulant from Dow designed to encapsulate electronic assemblies and dissipate heat effectively.

Available Sizes: 1 kg and 5 kg cans.

Shelf Life: Approximately 36 months (3 years) from the date of manufacture.

DOWSIL™ TC-6020 Thermally Conductive Encapsulant:


1. Features & Benefits

  1. High Thermal Conductivity

    • Formulated to effectively transfer heat away from sensitive electronic components, helping reduce the risk of overheating.
  2. Two‐Part Silicone Encapsulant

    • Consists of Part A and Part B. When mixed, it cures to form a resilient, heat-conductive elastomer.
  3. Moderate Viscosity & Flow

    • Flows sufficiently to fill gaps and irregular shapes, yet not so fluid as to run off components excessively.
  4. Reliable Dielectric Protection

    • Once cured, it provides electrical insulation, helping protect components from short circuits or high-voltage breakdowns.
  5. Environmental Durability

    • Maintains performance under moisture, vibration, and broad temperature extremes, contributing to long-term reliability.

2. Applications

  1. Power Electronics & Modules

    • Ideal for potting or encapsulating power inverters, converters, and similar devices that generate heat.
  2. Automotive & E-Mobility

    • Used in electronic control units (ECUs), battery management systems, and other modules exposed to temperature cycling and mechanical stress.
  3. LED Lighting Assemblies

    • Helps draw heat away from LED boards or drivers, improving efficiency and product lifespan.
  4. Industrial Control Systems

    • Protects sensors, drives, and power supplies in harsh operating conditions, ensuring stable thermal management.

DOWSIL™ TC-6020 Thermally Conductive Encapsulant:


Typical Properties

Property Typical Value / Range
Appearance (Mixed) Gray, flowable liquid
Viscosity (Mixed) Moderate (e.g., a few thousand mPa·s)
Mix Ratio (A : B) Typically 1 : 1 by weight (check datasheet)
Work Life / Pot Life Several hours at 25 °C (varies by conditions)
Cure Conditions e.g., 30 min at 100 °C or 24 hrs at 25 °C
Hardness (Shore A) ~40–60 (after full cure)
Thermal Conductivity ~2.0–2.5 W/m·K (approx. range)
Dielectric Strength ~20–25 kV/mm
Volume Resistivity ~10¹⁴ Ω·cm
Service Temperature –40 °C to +150 °C (typical)

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