High Dielectric Strength Epoxy Resin For Instrument Transformer Product Overview LE-9215 is a modified BPA (bisphenol A) epoxy resin, combined with LH-9215, a liquid modified carboxylic anhydride hardener. This thermally conductive epoxy adhesive is designed to protect electrical power components while providing effective insulation. Applications This epoxy resin is suitable for medium and high voltage electrical insulators, including contact boxes rated for 12kV to 40.5kV,