After several years of research and development, followed by scaling up to industrial processes in the laboratory, we produced 100% seaweed panels. To validate the assembly techniques, the panels were shaped using both digital tools and more traditional techniques. These formal experiments now make it possible to envisage many fields of application, such as furniture, interior fittings and scenography, offering a concrete alternative to particleboard. As well as being biodegradable, the different species of seaweed offer an almost infinite range of aesthetics.