Features of PI film 1. Heat resistance: PI has good weatherability, ranging from -270Â°C to 400Â°C. 2. Dimensional Stability With good dimensional stability, PI can maintain original dimensions after high-temperature processing. 3. Electrical Characteristics PI has excellent insulation property to protect the bottom layer of electronic components. 4. Chemical Resistance PI is insoluble in organic solvents and can thus resist corrosion.