Dow Dowsil 3-6512 Elastomer

Dow Dowsil 3-6512 Elastomer Datasheet
  • Description for Dow Dowsil 3-6512 Elastomer

    Extremely soft or firm, thermal/mechanical shock and vibration damping, excellent dielectric properties, flexible cure schedule, reversion resistant, thick section cure, compatible with automated dispensing equipment, and physical and electrical stability over a wide temperature range.

    *See Terms of Use Below

    Brand Dowsil
    Application Type Coating, Encapsulating, Seal
    1 Part or 2 Part 2 Part
    Material Form Gel
    Industry Circuits, E-Mobility Solutions, Electronics, Optoelectronics
    Manufacturer Dow
    Chemistry Silicone, Solvent-free
    Cure Method Part A/Part B
    Cure Temperature (°C) 20 to 25, 70
    Cure Time (min) 120
    Viscosity (cPs) 950
    Color Transparent Red, Transparent red
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -45, -55
    Elastomeric Soft Elastomer
    Light Refractive Index (RI) High
  • Technical Data for Dow Dowsil 3-6512 Elastomer

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 2 Part
    • Material Form
      • Gel
    • Industry
    • Application Method
      • Dispenser - Automated dispensing equipment
    • Cure Method
      • 2-Part Cure - Part A/Part B
    • Color
      • Clear / Transparent - Transparent red
      • Red - Transparent Red
    • Brand
      • Dowsil
    • Also Known As
      • Old Name - 3-6512 A & B Elastomer
    Specifications
    Cure Specs
    Cure Temperature (°C) 20 to 25, 70
    Cure Time (min) 120
    Viscosity (cPs) 950
    Work / Pot Time (min) Very long, 1,440 Test Method
    Mix Ratio 1:1 (by volume)
    Material Resistance
    High Temperature Resistance (°C) 200
    Low Temperature Resistance (°C) -45, -55
    Moisture/Humidity Resistance Moisture/humidity resistance
    Conductivity
    Dielectric Strength (V/mil) Excellent, 525
    Volume Resistivity (O) 4.3E+14 (ohms/cm)
    Hardness
    Elastomeric Soft Elastomer
    Shore OO Hardness 43
    Flexibility Flexible, Resilient
    Other Properties
    Light Refractive Index (RI) High
    Specific Gravity 0.970 Test Method
    Business Information
    Shelf Life Details Storage conditions and shelf life (“Use By” date) are indicated on the product label.
    Shelf Life Temperature (°F) 77
    Shelf Life (mon) 18
  • Best Practices for Dow Dowsil 3-6512 Elastomer

    *See Terms of Use Below

    1. Mixing

      Gels can be dispensed manually or by using one of the available types of meter mix equipment. Typically, the two components are of matched viscosities and are readily mixed with static or dynamic mixers, with automated meter-mix normally used for high volume processes. For low volume applications, manual weighing and simple hand mixing may be appropriate. Inaccurate proportioning or inadequate mixing may cause localized or widespread problems affecting the gel properties or cure characteristics. If possible, the potential for entrapment and incorporation of gas (typically air) should be considered during design of the part and selection of a process to mix and dispense the gel.

    2. Deairing/Degassing

      Some gels are supplied in bladder packs that avoid direct air contact with the liquid gel components, allowing use of air pressure over the pack in a pressure pot for dispensing. Do not apply air pressure directly to the liquid gel surface (without the bladder pack) as the gel can become supersaturated with air and bubbling can occur when the material is dispensed and cured. Use of bladder packs prevents bubbling, maintains cleanliness and avoids gel contamination.

      This is especially important with higher viscosity and faster-curing gels. Degassing at > 28 inches (10–20 mm) Hg vacuum may be necessary to ensure a void-free, protective layer.

    3. 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.

  • Comparable Materials for Dow Dowsil 3-6512 Elastomer

    *See Terms of Use Below

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Work / Pot Time Test Methods
Work / Pot Time Test Method Temperature
Very long Working Time
1,440 min Working Time 25°C
Specific Gravity Test Methods
Specific Gravity Test Method
0.970 Cured or uncured A & B.