Tadelakt is a plaster surface that you will find all throughout Moroccan architecture. It is used on floors, walls, sinks, showers, and more. It is made from lime plaster (sand, water, and lime). And it gets applied in stages with, as I understand it, wooden floats, trowels, and mechanical polishers. The last step is to apply a sealer, which then gives it a waterproof finish. This is why it is suitable for bathrooms and exterior walls. From the sounds of it, it’s a labor-intensive process, but apparently the result is a very durable finish. I also think it lends a modern feel because it’s a continuous application that can wrap corners and follow curves.