Panel facade systems are assembling of glass and aluminum profiles in factory environment by assembling the panels on site by means of cranes. The main advantage of the system is the easy and fast installation as well as the highest level of quality and structural performance. Structural silicone bonding process between glass and aluminum profile is carried out in a sterilized special room with silicone pump machines. Furthermore, the adhesion quality of the silicone is tested from the samples taken daily. This test data is stored in archives for a long time.