High-Voltage Insulating Coating for Arcing and Flashover Protection
SI-COAT 570HS is a high-voltage insulating silicone coating designed to protect electrical infrastructure from arcing, tracking, and flashover. In high-voltage environments, contaminants like dust, moisture, and pollution can create conductive paths across insulators, leading to dangerous electrical discharge. This phenomenon — known as surface tracking — can escalate into flashover, causing equipment failure, fire risk, and costly downtime.
570HS forms a hydrophobic, non-conductive barrier that resists moisture and surface contamination. Its arc-resistant properties help prevent electrical discharge even under extreme conditions, making it ideal for substations, switchgear, transformers, and other exposed components.
The coating’s high dielectric strength and long-term weatherability ensure reliable performance in South Africa’s diverse climates — from coastal humidity to dry inland heat. It’s a proven solution for utilities, municipalities, and industrial operations seeking to extend the life of their electrical assets and reduce maintenance costs.
SI-COAT 570HS High Voltage Insulator Coating for Switchgear and Transformers
CSL Silicones developed SI-COAT 570HS to perform reliably in demanding climates. In South Africa, electrical networks face unique challenges—coastal humidity accelerates corrosion, industrial pollution creates conductive layers, and inland dust compromises insulation. This coating helps utilities and industries maintain system reliability under these conditions.
Key Features
- Retains hydrophobicity even after years of service
- Resists UV, moisture, and pollution
- Prevents flashovers and reduces outages
- Applies easily by brush or spray
- Performs consistently across diverse climates
Versatile Applications Across HV and MV Equipment
SI-COAT 570HS is not limited to insulators. It also protects medium- and high-voltage switch-over breakers and transformers, which are critical components exposed to the same environmental stressors. By applying this coating, operators can reduce maintenance costs and extend equipment life.
Why Choose SI-COAT 570HS?
Unplanned outages are costly and disruptive. This coating offers a proven solution to minimize downtime and improve reliability. Its long-term performance makes it a smart investment for substations, transmission lines, and transformer yards.
Application Tips
SI-COAT 570HS can be applied by brush or spray, making it suitable for both maintenance crews and large-scale projects. Ensure surfaces are clean and dry before application for maximum adhesion and performance.
Learn more about SI-COAT 570HS HVIC on our product page
