To make car bodies corrosion-resistant, they pass through several coating processes. In these processes, however, the material does not reach the cavities inside the car body. To protect them against corrosion as well, layers of wax are applied to these interior spaces, which is generally referred to as cavity preservation.
A floodable car body design is a prerequisite for using the flooding method for cavity preservation. During flooding, the heated flooding wax is pumped into the cavities of the car body via nozzles. When the car body is then lifted and tilted, the wax is distributed in the cavities. The excessive flooding wax drips into a collecting tank and can be reused.
Eisenmann offers another cavity preservation method: Spraying