Dow 3-6876 Black Adhesive

Dow 3-6876 Black Adhesive Datasheet
  • Description for Dow 3-6876 Black Adhesive

    Noncorrosive; self-priming; rapid heat cure; high strength; good flow.

    *See Terms of Use Below

    Application Type Bond, Gasketing
    1 Part or 2 Part 1 Part
    Material Form Liquid, Silicone elastomer
    Substrate Aluminum
    Industry Sealing lids and housings, Engine controlers, Lighting, E-Mobility Solutions, Smart Meters, Smart Home Devices, Baseplates, Connector
    Manufacturer Dow
    Chemistry Silicone elastomer
    Cure Method Heat, Addition cure
    Cure Temperature (°C) 100, 125, 150
    Cure Time (min) Rapid, , , 30
    Viscosity (cPs) Low, 41,275
    Color Black
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -45, -55
  • Technical Data for Dow 3-6876 Black Adhesive

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Elastomer - Silicone elastomer
      • Liquid
    • Substrate
    • Industry
      • Lighting
      • E-Mobility Solutions
      • Electronics - Sealing lids and housings, Baseplates, Connector
      • Smart Meters
      • Smart Home Devices
      • Engine - Engine controlers
      • Other - ABS, Transmission controlers
    • Chemistry
    • Application Method
      • Dispenser - Automated or manual needle dispense
    • Cure Method
      • Heat
      • 2-Part Cure - Addition cure
    • Color
      • Black
    Specifications
    Cure Specs
    Cure Temperature (°C) 100, 125, 150
    Cure Time (min) Rapid, 30
    Viscosity (cPs) Low, 41,275
    Tack Free Time (min) Fast Test Method
    Work / Pot Time (min) Long Test Method
    Thixotropic Good
    Bond Strength
    General Bond Strength (psi) High
    Shear Strength (psi) 640 Test Method
    Tensile Strength (psi) 795, High
    Material 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, 0.00100 Test Method
    Dielectric Strength (V/mil) Good, Durable, 525
    Dielectric Constant 2.81, 2.78 Test Method
    Volume Resistivity (O) 1E+14 (ohms/cm)
    Hardness
    Shore A Hardness 53
    Elongation (%) 255
    Flexibility Flexible
    Modulus (psi) 310 Test Method
    Other Properties
    Specific Gravity 1.311 Test Method
    Coefficient of Thermal Expansion (CTE) 250 (ppm/ºC) Test Method
    Business Information
    Shelf Life Details Dow Corning heat-cure adhesives should be stored at or below 25°C (77°C). Containers should be kept tightly closed and kept in cold storage at all times to extend shelf life. Shelf life is indicated by the “Use Before” date found on the product label.
    Shelf Life Temperature (°F) 41
    Shelf Life (mon) 12
    Not Good For
    Don't Use With Plastic, Rubber
  • Best Practices for Dow 3-6876 Black Adhesive

    *See Terms of Use Below

    1. Surface Preparation

      All surfaces should be thoroughly cleaned and/or degreased with Dow Corning® brand OS Fluids, naphtha, mineral spirits, methyl ethyl ketone (MEK) or other suitable solvent. Solvents such as acetone or isopropyl alcohol (IPA) do not tend to remove oils well, and any oils remaining on the surface may interfere with adhesion. Light surface abrasion is recommended whenever possible, because it promotes good cleaning and increases the surface area for bonding. A final surface wipe with acetone or IPA is also useful. Some cleaning techniques may provide better results than others

      users should determine the best techniques for their particular applications.

    2. Mixing

      Upon standing, some filler may settle to the bottom of the liquid containers after several weeks. To ensure a uniform product mix, the material in each container should be thoroughly mixed prior to use. Two-part materials should be mixed in the proper ratio (1:1 or 10:1) either by weight or volume. The presence of light colored streaks or marbling indicates inadequate mixing.

    3. Deairing/Degassing

      Automated airless dispense equipment can be used to reduce or avoid the need to de-air. If de-airing is required to reduce voids in the cured elastomer, consider a vacuum de-air schedule of >28 inches Hg for 10 minutes or until bubbling subsides.

    4. Testing

      Due to the wide variety of substrate types and differences in substrate surface conditions, general statements on adhesion and bond strength are impossible. To ensure maximum bond strength on a particular substrate, 100 percent cohesive failure of the adhesive in a lap shear or similar adhesive strength test is desired. This ensures compatibility of the adhesive with the substrate being considered. Also, this test can be used to determine minimum cure time or can detect the presence of surface contaminants such as mold release agents, oils, greases and oxide films.

  • Comparable Materials for Dow 3-6876 Black Adhesive

    *See Terms of Use Below

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Tack Free Time Test Methods
Tack Free Time Tack Free Temperature
Fast
Work / Pot Time Test Methods
Work / Pot Time Temperature
Long
Shear Strength Test Methods
Shear Strength Type Substrate
640 psi Lap shear strength Aluminum
Dielectric Constant Test Methods
Dielectric Constant Test Method
2.81 Dielectric constant, 100 Hz
2.78 Dielectric constant, 100 KHz
Dissipation Factor Test Methods
Dissipation Factor Test Method
0.00800 Dissipation factor, 100 Hz
0.00100 Dissipation factor, 100 KHz
Modulus Test Methods
Modulus Test Method
310 psi Tensile Modulus
Specific Gravity Test Methods
Specific Gravity Test Method
1.311 Cured
Coefficient of Thermal Expansion (CTE) Test Methods
Coefficient of Thermal Expansion (CTE) CTE Test Method
250 (ppm/ºC) By TMA