Function and recommendations.
The surface treatment is applied after the joint treatment. It works as an intermediate layer between the AQUAPANEL® Cement Boards and the surface finishing. We recommend to always apply it, to ensure the correct performance of the Knauf Exterior Wall. To find out more about the diverse finishing options, visit the creative freedom section in Knauf Exterior Wall advantages section: https://www.aquapanel.com/products-solutions/exterior-walls-facades/knauf-exterior-wall/the-advantages .