Cembonit A strong, weather-proof cladding board characterized by its muted, matt finish. During manufacturing, the through-colored board receives a unique surface treatment which makes it powerfully resistant towards water staining and dirt, ensuring a long-lasting and durable façade. Cembonit comes in 11 subtle colors. The natural authenticity of the Cembonit board is expressed through the slight color variations in the surface, imbuing your façade with the play of light and nuances you associate with any natural building material. Over time, these natural variations may develop further as the surface patinates.