Calcium Silicate Board made from siliceous and calcareous materials reinforced with cellulose fibers. The boards are made using laminar process and then HPSC process to give a stable
crystalline structure. It is the only 4-hour fire rated board and is dimensionally stable even when it is soaked in water for 24 hours. Its acoustic tiles have superior sound resistant properties with transmission class between 39 – 56 dB, making it a suitable choice for tunnels, conference halls, recording studios and theatres.