Two differet access to clean room’s changing rooms directly from surrounding production line corridor. The need to collect and retain dirty, dust particles and contaminant agents before entering the critical areas, forced the management to install decontaminating floorings inside the access areas to changing rooms. These invisible barriers allow easily to collect and stop all viable contaminanting agents when operators walk in the changing rooms. In the last picture the it is clearly visible the kind of dirty retained, all over the surface and in every corner, right 5 minutes after the install operatione were over. This kind of goal should not be possible to achieve using traditional peel-off mats simply due to the very little coverage can offer.