The building is situated at about 40 - 50 meters distance from the Piraeus harbor in Athens. It has three underground levels of 6000 sq.m total surface. The situation was a water ingress with very high pressure in these undergroud levels. For 3 years several attempts had been made to seal the building and stop the water ingress without any success. KOESTER KB-PUR 2IN1 and Waterstop were used to seal the leakages. Since the application there has not been any more water ingress or leakage.