The repair of a warped peripheral planar sealing surface commonly provided on gear box or similar complex housings comprises the machining of the entire sealing face of the housing to a planar configuration and then removing additional metal from the edges of the sealing face to accommodate an adhesive sealant to secure a metallic gasket to the component so that the exposed face of the metallic gasket is not only planar but is disposed at the same dimensional location as the original face.