Fiber cement board is a stable performance and light weight building &decoration board used cement as major and natural reinforced, with the process of pulping, emulsion, forming, pressing, autoclaving , drying and surface treatment.The color is gray. With the sanding surface, thickness uniformity is better and grain is clearer. And because of the cement , the strength is higher, and water proof performance is much better.So fiber cement board is the highest quality product in domestic and foreign building materials market . -