Calderys has completed its acquisition of Hysil's calcium silicate insulation division. The deal was signed in January 2020 but delayed to July 2020 due to coronavirus-related lockdowns. Calcium silicate boards are used for thermal insulation in industries such as cement, metallurgy, oil refinery, petro-chemical and power plants. Calderys says it now the largest manufacturing capacity of calcium silicate boards in India and South East Asia. The purchase will enable it to expand its product portfolio and offer calcium silicate insulation products along with refractories solutions.