The metro’s underground tunnels and stations are treated with Xypex Admix C 1000 NF added during batching. By making this part of the structure itself, we avoided external membranes and ensured robust, water-resistant concrete in a high water table setting. Product Used: Xypex Admix C-1000 NF Scope: Tunnels, underground stations, and service shafts Details: The product was added during batching to simplify construction sequencing and avoid reliance on membrane systems. It actively seals micro-cracks and prevents water ingress in high water table zones. Outcome: Long-term waterproofing integrity for critical transit infrastructure.