This specification covers a two-component air-curing, aluminum-powder -filled, epoxy-resin-base material in the form of a paste or putty, suitable for application by spatula or putty-knife. Primarily for filling small holes, crevices, and gaps or for smoothing areas requiring thin layers of material to produce the required smoothness on aerodynamic surfaces subject to service temperatures from -55 to +85 degrees C (-65 to +185 degrees F).