Saint‑Gobain brings together the construction‑chemicals expertise of Chryso, a specialist in cement additives and concrete admixtures, GCP, a world-renowned expert in waterproofing systems, Fosroc, a leading provider of specialty construction solutions, and Weber, a worldwide leader in mortar-based solutions.

Built on close collaboration with tunnelling contractors, designers and project owners, our consultative, end‑to‑end approach spans from early design support through to on‑site execution.

Our solutions enable the production of low-carbon concrete, help control water ingress in tunnels and underground infrastructure, ensure their proper functioning in complex and hostile ground conditions, extend their service life, and provide long-term, sustainable and environmentally friendly protection.

Together, we develop innovative solutions to address today’s and tomorrow’s construction challenges.