Clay plaster, also known as earthen plaster, is composed of clay, sand, fibers, and sometimes additives like straw or lime. Clay is naturally abundant. Besides, low-energy is needed for its processing. This material can be considered a more sustainable alternative to gypsum plaster.

Clay plaster is fire resistant, it offers good adhesion and breathability. It has a smooth and pliable texture, making it easy to mold and shape. It can be applied in thin layers, allowing for intricate detailing or sculpting.

After the plaster has been applied, it should dry and harden. This can take several days or even weeks, depending on the thickness of the plaster and the conditions in your working space.

During this time, it is important to keep the plaster moist to prevent it from drying out too quickly and cracking. This can be done by misting the plaster with water or covering it with a damp cloth. Once the plaster is fully dry, it can be sealed with a natural oil or wax to protect it.

Clay plaster is known for its ability to absorb and release moisture and thus prevent the formation of mold.  If clay plaster gets damaged, it can be easily repaired.

Clay plaster can be recycled and reused through a simple low energy process. It is also biodegradable and can be even composted.