Concrete waterproofing was needed in the construction of the Midtown Towers for the foundation of the building, the 7 underground floors, the water tanks, swimming pool structures, and the rain drainage tunnel. Some of the challenges faced on this project included: high hydrostatic pressure, seven different concrete mix designs and, casting concrete in a busy, congested area. Clearly, a solution was required to address these challenges, most importantly providing waterproofing and durability to the concrete.