Synthite AC-41 is a high-temperature, fast-curing, air-dry polyurethane varnish designed for superior electrical insulation and conformal coating of components such as field coils, motor frames, PCBs, and soldered joints. It forms a tough, clear, chemically resistant film with excellent moisture, oil, and abrasion resistance, and adheres well to most surfaces. The varnish dries to touch in 10 minutes and is fully dry in 30 minutes, with a viscosity of 40–60 seconds (ISO Cup No. 6 at 23°C) and a specific gravity of 900±20 g/L at 25°C. It offers a dielectric strength of 2000 V/mil (dry) and 1200 V/mil (wet), and is compatible with a wide range of electrical and electronic parts, providing reliable protection in demanding environments. Application is simple by dip, brush, or spray, and it is suitable for use in rotating machines under 1kV. Shelf life is 24 months in original, sealed containers. Always consult the safety data sheet before use.