Epoxy 2-component systems harden at both cold and warm temperatures. The application of heat can of course reduce the curing time. Heat will increase the interlocking density, therefore final strength tends to increase and stays at a higher level. In 2-component epoxy resin systems the working qualities of both components are adjusted to each other and are user-friendly. The exact dosage proportions are given exactly by the manufacturer and could not varied. The dosing, mixing and application could be done by hand or mechanically. It is easy applicable. The variable curing time and the continuously adjusted reactivity of the adhesive makes 2-component epoxy adhesives systems as excellent problem-solver where metals are used, so like in the transportation area or aircraft and construction section.