NP511B pre-preg is composed of a high temperature electrical grade of epoxy resin (Tg = 170°C) combined with a woven glass substrate. This grade of pre-preg is not flame retardant. With a non-brominated resin system, the product offers high mechanical strength at temperatures up to 170°C. Properly cured, it will retain half its room temperature flexural strength at elevated temperatures (150°C, after conditioning at 150°C for one hour). It can be produced on any glass style for non-G11 applications. This electrical-mechanical grade is suitable for rotor slot insulation, steel coating, and honeycomb wall panels.