The acrylic finish system with sand and cement base is fundamentally similar to the traditional stucco system. A sand and portland cement base coat with lime and water is applied over a building that has been properly sealed with weather barrier and wrapped in structural lath or wire.
A second layer of sand and cement is then applied. This layer is levelled with a tool called a Darby and further to this is then ‘floated’ with a sponge.
This step smoothes and levels hills and voids in the wall. This is a critical step because the acrylic finish is typically not textured and as a result will show any imperfections in the wall.