Description Cboard is a 100% asbestos free fibre cement board manufactured in Saudi Arabia by ASK Gypsum Factory Ltd from a homogenous mixture of Portland cement and high purity silica sand with a reinforcing fibre known as Cellulose (a plant extract) or pulp added in versatile doses, using the latest technology of pressing and autoclave processes. Cboard is a very strong and more durable board, with superior physical and mechanical properties, and it can be used in the interior and exterior works.