The profiles are used in structures, for which an additional requirement for expansion slit protection is their resistance to water. This applies in most cases to rooms susceptible to permanent contact with water or other fluids, multi-storey parking lots, ramps or pedestrian overpasses. Assuring water-tightness is in this case related to the knowledge of types of transport vehicles that will be used in that particular space, and the tyres they will use. An advantage of the offered profiles is their resistance to outside influences and aggressive media. They are characterised by great load bearing capacity and the ability of transferring large movements.