It is a one-part, fibre-reinforced, low-shrinkage concrete repair mortar that turns damaged, weak or corroded reinforced concrete back into a strong, load-bearing surface — and all you add is clean water. Rated Class R4 (the highest structural class under EN 1504-3), it's the same professional-grade mortar engineers specify for bridges, dams and water tanks, now available over the counter at Shabbiri Hardware, Ongata Rongai & Tuala.Why Contractors in Kenya Choose Sika MonoTop-4012 ..