CASE STUDY www.fosroc.com In 2005, King Fahad Dammam Road Underpass, one of the city’s principal road arteries, was constructed as a link between Dammam and Al-Kobar cities . However, after a few years the two tunnels of the major underpass have become dangerous for motorists due to leaking of water and uneven road. It had originally been waterproofed on the wet-side by a polyurethane coating but the external waterproofing was

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