Dow 3099 HVIC Compound Datasheet Dow 3099 HVIC Compound

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  • Description for Dow 3099 HVIC Compound

    Non-tracking; arc and flashover resistant; good adhesion; easy to use grease like silicone coating.

    *See Terms of Use Below

    Application Type Coat, Pot, Encapsulant
    1 Part or 2 Part 1-Part
    Material Form Grease
    Industry Electrical insulators
    Manufacturer Dow
    Chemistry Silicone
    Color Gray, Opaque
    Arc Resistance (sec) Arc
    Other Resistance Flashover, Non-tracking
    Volume Resistivity (O) 1.46e13 (ohms/cm)
  • Technical Data for Dow 3099 HVIC Compound

    • Application Type
    • 1 Part or 2 Part
      • 1-Part
    • Material Form
      • Grease
    • Industry
    • Chemistry
    • Application Method
      • Dispenser - Air-less spray equipment, Airless pumps
      • Brush - Bristle brush, Cloth pad, Hand
      • Spray
    • Cure Method
      • None
    • Color
      • Gray
      • Other - Opaque
    Bond Strength
    General Bond Strength (psi) Good
    Material Resistance
    Arc Resistance (sec) Arc
    Other Resistance Flashover, Non-tracking
    Dissipation Factor 0.01480, 0.00660 Test Method
    Dielectric Strength (V/mil) 285 Test Method
    Dielectric Constant 3.88, 3.86 Test Method
    Volume Resistivity (O) 1.46e13 (ohms/cm) Test Method
    Other Properties
    Specific Gravity 1.300 Test Method
    Flash Point (°F) 249.8 Test Method
    % Solids (%) 100 Test Method
    Business Information
    Shelf Life Details DOW CORNING 3099 HVIC Compound has a shelf life of 60 months from date of manufacture
    Shelf Life Type from date of manufacture
    Shelf Life (mon) 60
  • Best Practices for Dow 3099 HVIC Compound

    *See Terms of Use Below

    1. Surface Preparation

      First clean the insulator surface. Traces of organics or cleaning detergents must be removed. It is particularly important that the insulator surfaces be dry before applying to insure the best results.

    2. Application

      Apply DOW CORNING 3099 Compound to the insulator surface by hand, cloth pad, or with a bristle brush. Start with the top insulator, treating the stack. On fog-type insulators, take care not to overfill between the underside skirts as this shortens the leakage distance and subjects the insulator to an unnecessarily high voltage stress. The consistency of DOW CORNING 3099 HVIC Compound is such that normal hand application will result in a coating thickness of between 1/16- inch and 1/8-inch. A coating thickness of between 1/16-inch and 1/8-inch can also be obtained by spraying DOW CORNING 3099 HVIC Compound. This is ideal for all but the most severely contaminated conditions where the coating thickness should be 1/8-inch. It is important to apply a smooth, complete coating of DOW CORNING 3099 HVIC Compound. Its grey, opaque nature aids the user in doing this since he can see where it has been applied. DOW CORNING 3099 HVIC Compound can be applied with air-less spray equipment if diluted with an appropriate solvent to the desired viscosity. Handle solvents per manufacturer’s recommendations for safety and in accordance with local, state, and federal regulations. A dilution ration of approximately 70 percent compound and 30 percent solvent is recommended as a starting point. Mix thoroughly to ensure a consistent and even application rate. Properly diluted DOW CORNING 3099 HVIC Compound can be sprayed with Alemite models 7877,7827, and 707-B

      Gray Company model 225-877

      Lincoln Engineering model 83492 Airless pumps and Aro-model 650-044 pump. Other pump manufacturers supply airless spray equipment, which should perform satisfactorily if the compression ration is at least 26:1. The air pressure to the pump will vary with the orifice size on the nozzle. Nozzles with orifices from 0.013 to 0.026 inch diameter with fan width angles from 10 to 50 degrees may be used, depending on the size and shape of the insulators to be coated. The larger orifice nozzles require 40 to 60 psi, while the smaller ones require 60 to 80 psi.

    3. Removal

      DOW CORNING 3099 HVIC Compound shows little change in consistency under field conditions and remains soft even though contaminated with large quantities of dirt particles. If can be removed without heat or excessive force. Just wipe the insulators with coarse textured rags or paper towels. The surface is then ready for a new coat.

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Dielectric Constant Test Methods
Dielectric Constant Test Method
3.88 ASTM D 150, 100 Hz
3.86 ASTM D 150, 1000 Hz
Dielectric Strength Test Methods
Dielectric Strength Test Method
285 V/mil ASTM D 149, 50 mil thick
Dissipation Factor Test Methods
Dissipation Factor Test Method
0.01480 ASTM D 150, 100 Hz
0.00660 ASTM D 150, 1000 Hz
Volume Resistivity Test Methods
Volume Resistivity Test Method
1.46e13 (ohms/cm) ASTM D 149
Flash Point Test Methods
Flash Point Test Method
121.0°C CTM 0006
% Solids Test Methods
% Solids Test Method
100 % CTM 0208, Solids, g/1/C
Specific Gravity Test Methods
Specific Gravity Temperature Test Method
1.300 25°C CTM 0001A