This resin system also known as PU (H) is designed to encapsulate current and potential transformers. It is formulated in a ready to use pack which makes it user friendly. By encapsulating the core, resins create a complete barrier against the environment and provide superior performance under extreme conditions. PU (H) has excellent electrical, mechanical, and thermal strength while providing a flawless finish.Excellent Electrical, Mechanical and Thermal Strength.