Mineral coating is a procedure for renovating sewer manholes and sewer structures. Mortar coatings are used for sealing, reprofiling and coating masonry and concrete components.

After cleaning the structures are sealed with mineral systems or reaction resin. During the following reprofiling a surface suitable for coating is produced, which evens out existing irregularities and replaces detached concrete or masonry substance.

During the coating a cohesive mortar layer is applied by hand or mechanically to the inner wall of sewer manholes and other sewer structures.