2mm and 3mm exterior texture are both types of wall finishes used for exterior walls of buildings. They are typically made of a cementitious material that contains sand, polymers, and other additives to give them a textured and durable finish. The 2mm exterior texture is a relatively thin layer that provides a subtle texture to the surface. It is often used as a base coat before applying a thicker layer of finish. It can also be used as a final coat for a smoother finish. On the other hand, the 3mm exterior texture is a thicker layer that provides a more pronounced texture to the surface. It is often used as a final coat to create a more decorative and rugged finish. This thickness can also help to cover up minor imperfections in the underlying surface. Both 2mm and 3mm exterior textures are highly durable and resistant to weathering, making them ideal for use on exterior walls. They can be applied in a variety of colors and finishes, such as smooth or coarse, depending on the desired aesthetic effect.