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Description for Dow 3099 HVIC Compound
• Protective coating for electrical insulators • Grease like silicone compound • Non-tracking • Arc-resistant • Good adhesion • Easy to use • Gray opaque appearanceChemical Resistance Chemical Resistance: Fluid Resistance: Water repellency Application Type Coating 1 Part or 2 Part 1-Part Material Form Grease Industry Especially formulated to give electrical insulators Manufacturer Dow Chemistry Silicone Color Gray, Opaque Arc Resistance (sec) Arc resistant Other Resistance Non-tracking Volume Resistivity (O) 1.46e13 (ohms-cm) -
Technical Data for Dow 3099 HVIC Compound
Overview
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Chemical Resistance
- Chemical Resistance : Fluid Resistance : Water Resistance - Water repellency
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Application Type
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1 Part or 2 Part
- 1-Part
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Material Form
- Grease
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Industry
- Electronics - Especially formulated to give electrical insulators
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Chemistry
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Application Method
- Dispenser - Air-less spray equipment, Airless pumps
- Brush - Bristle brush, Cloth pad, Hand
- Spray
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Cure Method
- None
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Color
- Gray
- Other - Opaque
Specifications
Bond Strength
General Bond Strength (psi) Good adhesion Material Resistance
Arc Resistance (sec) Arc resistant Other Resistance Non-tracking Conductivity
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 MOLYKOTE® 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 -
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Best Practices for Dow 3099 HVIC Compound
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Surface Preparation
First, clean the insulator surface. Traces of organics or cleaning detergents must be removed. It is particularly important that the insulator surface be dry before applying to ensure the best results.
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Application
Easy to use
Apply MOLYKOTE® 3099 Compound to the insulator surface by hand, cloth pad, or with a bristle brush. Start with the top insulator, treating the underside first and working down 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 MOLYKOTE® 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 MOLYKOTE® 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 MOLYKOTE® 3099 HVIC Compound. Its gray, opaque nature aids the user in doing this since s/he can see where it has been applied. MOLYKOTE® 3099 HVIC Compound can be applied with airless 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 ratio 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 MOLYKOTE® 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 that should perform satisfactorily if the compression ratio 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.
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Removal
MOLYKOTE® 3099 HVIC Compound shows little change in consistency under field conditions and remains soft even though contaminated with large quantities of dirt particles. It 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 |
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3.88 | ASTM D 150, 100 Hz, Specification writers: These values are not intended for use in preparing specifications |
3.86 | ASTM D 150, 1000 Hz, Specification writers: These values are not intended for use in preparing specifications |
Dielectric Strength Test Methods
Dielectric Strength | Test Method |
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285 V/mil | ASTM D 149, 50 mil thick, Specification writers: These values are not intended for use in preparing specifications |
Dissipation Factor Test Methods
Dissipation Factor | Test Method |
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0.01480 | ASTM D 150, 100 Hz, Specification writers: These values are not intended for use in preparing specifications |
0.00660 | ASTM D 150, 1000 Hz, Specification writers: These values are not intended for use in preparing specifications |
Volume Resistivity Test Methods
Volume Resistivity | Test Method |
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1.46e13 (ohms-cm) | ASTM D 149, Specification writers: These values are not intended for use in preparing specifications |
Flash Point Test Methods
Flash Point | Test Method |
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>121.0°C | CTM 0006, Closed cup, Specification writers: These values are not intended for use in preparing specifications. |
% Solids Test Methods
% Solids | Test Method |
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100 % | CTM 0208, Solids, g/1/C, Specification writers: These values are not intended for use in preparing specifications. |
Specific Gravity Test Methods
Specific Gravity | Temperature | Test Method |
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1.300 | 25°C | CTM 0001A, Specification writers: These values are not intended for use in preparing specifications. |