1.1 ,This specification covers the requirements for an epoxy resin system intended for the repair of sandwich panels for durable, rigidwall, relocatable structures. It must be usable in a field environment and shall not require the use of special equipment such as autoclaves or presses. The epoxy system covered by this specification shall be usable for simultaneous impregnation of a wet-layup composite skin and bonding of that skin to a substrate honeycomb core. The material shall withstand exposure to temperatures from −,54 to 93°,C (−,65 to 199°,F) and high relative humidity, and also the combination of stress, temperature, and relative humidity that are expected to be encountered in service.