Rymax foam cement board | exterior drywall Of, anti-shock and pollution-free. The core layer made of polystyrene concrete heavily reduces the weight and enables the panel to form multi-arched structures and have high flexural strength and compressive resistance. The groove and tongue structure helps to build a strong and stable structure in one piece. The industrialized production helps shorten the construction period and enhance the installation efficiency, also the panel is nice decoration and easy for installing piping. Since the wallboard is light and thin, it greatly reduces the loads of the foundation, beams and columns and Environment-friendly; Energy-conservative; Fire-proof; Factory packing