EP 2-component systems harden at both cold and warm temperatures. The application of heat can reduce the curing time. Heat increases the interlocking density, the final strength tends to increase and stays at a somewhat higher level. In 2-component epoxy resin systems the working qualities of both components are adjusted to each other and are user-friendly. The dosage proportions are given by the manufacturer and could not be varied. The dosing, mixing and application can be done by hand or mechanically. The variable curing time and the continuously adjusted reacticity of the adhesive make 2-component epoxy adhesive systems as excellent problem-solvers where metals are used in the transportation sector or aircraft construction.