Dow 567 Primerless Silicone Encapsulant

Dow 567 Primerless Silicone Encapsulant Datasheet
  • Description for Dow 567 Primerless Silicone Encapsulant

    Two part; 1:1 mix; heat cure; minimal shrinkage; no exotherm during cure; no solvents or cure byproducts; repairable; good dielectric properties.

    *See Terms of Use Below

    Application Type Pot, Encapsulate
    1 Part or 2 Part 2 Part
    Material Form Liquid, Silicone elastomer
    Substrate Primerless
    Industry Electronics, Housing and Assembly, Smart Meters, E-Mobility Solutions, Smart Home Devices, Insulation, Headlamp assemblies
    Manufacturer Dow
    Chemistry Silicone, Solvent-free, Silicone elastomer
    Cure Method Part A/Part B, Heat
    Cure Temperature (°C) 70, 100
    Viscosity (cPs) 1,540, Flowable
    Color Black
    Ozone Resistance Ozone resistance
    Chemical Resistance Good
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -45, -55
    Key Specifications Mil-Spec (United States Military Standard): PRF-23586F (Grade B2): MIL-PRF-23586F (Grade B2), Type I, Class IV, QPL, UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94: UL 94 V-0
  • Technical Data for Dow 567 Primerless Silicone Encapsulant

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 2 Part
      • Part A Name - Part A
      • Part B Name - Part B
    • Material Form
      • Elastomer - Silicone elastomer
      • Liquid
    • Substrate
      • Primerless
    • Industry
      • Housing and Assembly
      • E-Mobility Solutions
      • Headlamp - Headlamp assemblies
      • Electronics
      • Smart Meters
      • Smart Home Devices
      • Insulation
    • Chemistry
    • Application Method
      • Dispenser - Automated mixing, Dispensing equipment, Manual mixing
    • Cure Method
      • Heat
      • 2-Part Cure - Part A/Part B
    • Color
      • Black
    • Key Specifications
      • Mil-Spec (United States Military Standard): PRF-23586F (Grade B2): Type I, Class IV, QPL - MIL-PRF-23586F (Grade B2), Type I, Class IV, QPL
      • UL (Underwriters Laboratory), ULC (Underwriters Laboratories of Canada), NFPA (National Fire Protection Association): UL 94: V0 - UL 94 V-0
    Specifications
    Cure Specs
    Cure Temperature (°C) 70, 100
    Viscosity (cPs) 1,540, Flowable
    Linear Shrinkage (%) minimal shrinkage
    Work / Pot Time (min) >4,320 Test Method
    Mix Ratio 1:1 (by volume), 1:1 (by weight)
    Bond Strength
    Shear Strength (psi) 140 Test Method
    Material Resistance
    Flame Resistance Good flame resistance
    Ozone Resistance Ozone resistance
    Chemical Resistance Good
    UV Resistance UV resistance
    Environmental Resistance Environmental resistance
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -45, -55
    Moisture/Humidity Resistance Moisture/humidity resistance
    Conductivity
    Dissipation Factor 0.00800, 0.00200 Test Method
    Dielectric Strength (V/mil) Good, Durable
    Dielectric Constant 2.85, 2.79 Test Method
    Thermal Conductivity (W/m°K) 0.29
    Volume Resistivity (O) 6e16 (ohms/cm)
    Hardness
    Shore A Hardness 40
    Other Properties
    Specific Gravity 1.240
    Coefficient of Thermal Expansion (CTE) 300 (Linear (µm/m- ºC or ppm) Test Method
    Flash Point (°F) 239.0
    Business Information
    Shelf Life Details Shelf life is indicated by the “Use Before” date found on the product label. Refer to the product label for storage temperature requirements.
    Shelf Life Temperature (°F) 77
    Shelf Life Type From date of manufacture
    Shelf Life (mon) 24
  • Best Practices for Dow 567 Primerless Silicone Encapsulant

    *See Terms of Use Below

    1. Surface Preparation

      In applications requiring good adhesion, priming may be required for many of the silicone encapsulants which are “non -primerless. For best results, the primer should be applied in a very thin, uniform coating and then wiped off after application. After application, it should be thoroughly cured prior to application of the silicone elastomer. Additional instructions for primer usage can be found in the information sheets specific to the individual primers.

    2. Mixing

      These products are supplied in a 1 to 1 mix ratio, which is very robust in manufacturing environments and allows for some process and dispense equipment variation. In most cases deairing is not required.

    3. Deairing/Degassing

      These products are supplied in a 1 to 1 mix ratio, which is very robust in manufacturing environments and allows for some process and dispense equipment variation. In most cases deairing is not required.

    4. Testing

      If a substrate or material is questionable with respect to potentially causing inhibition of cure, it is recommended that a small scale compatibility test be run to ascertain suitability in a given application. The presence of liquid or uncured product at the interface between the questionable substrate and the cured gel indicates incompatibility and inhibition of cure.

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    *See Terms of Use Below

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Work / Pot Time Test Methods
Work / Pot Time Temperature
>4,320 min 25°C
Shear Strength Test Methods
Shear Strength Type
140 psi Lap shear strength
Dielectric Constant Test Methods
Dielectric Constant Test Method
2.85 Dielectric Constant, 100 Hz
2.79 Dielectric Constant, 100 KHz
Dissipation Factor Test Methods
Dissipation Factor Test Method
0.00800 Dissipation factor, 100 Hz
0.00200 Dissipation factor, 100 KHz
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Test Method
300 (Linear (µm/m- ºC or ppm) By DMA