CharCoat IC is a room-temperature vulcanized (RTV) silicone elastomer coating designed to protect high voltage outdoor insulators from pollution flash-over. Developed in collaboration with the Electric Power Research Group at the University of the Witwatersrand, it leverages advanced silicone technology to ensure reliable performance in harsh, polluted environments. Its hydrophobic properties prevent the formation of conductive layers, enhancing system reliability.
Core Technology: Hydrophobic silicone elastomer with low molecular weight silane migration.
CharCoat IC is a room-temperature vulcanized (RTV) silicone elastomer coating designed to protect high voltage outdoor insulators from pollution flash-over. Developed in collaboration with the Electric Power Research Group at the University of the Witwatersrand, it leverages advanced silicone technology to ensure reliable performance in harsh, polluted environments. Its hydrophobic properties prevent the formation of conductive layers, enhancing system reliability.
Core Technology: Hydrophobic silicone elastomer with low molecular weight silane migration.
CharCoat IC’s exceptional hydrophobicity inhibits moist conductive layers on insulator surfaces, limiting leakage currents and preventing dry band formation and partial discharges—key factors in flash-over. The coating transfers its water-repellent properties to contaminants via silane migration, maintaining performance even in severe conditions. Its specialized fillers resist power arc damage, and the primer ensures strong adhesion to ceramic, glass, and resin surfaces.
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Parameter
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Value / Details
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Fire Resistance
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Flammable with toxic fumes; use CO2, dry powder, or foam (not water jet).
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Application Method
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Airless spraying (tip size 0.010–0.012”, 6–7 bar, fan width ~5.5 cm).
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Drying/Curing Time
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Skin-over in 15 minutes; pot life of 1 hour at 23°C after catalyst addition.
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Color / Finish
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Standard white (can be top-coated with acrylic or urethane for color)
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Service Temperature
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Down to -50°C after full cure.
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CharCoat IC is water-based, non-toxic, halogen-free, and low VOC, offering safer use, minimal environmental impact, and sustainable long-term performance.
