Sentral Senayan Apartment Tower C & D Waterproofing Project Sentral Senayan Apartment Tower C & D Jl. Asia Afrika Jakarta, Indonesia Completion Date Product Volume 2011 HPI System 3,087 m3 Area Completed : Basement and Retaining Wall Architect Kajima Design Engineer PT. Wiratman & Associates Contractor PT. Kajima Indonesia Developer/Owner PT. Senayan Trikarya Sempana