Cementitious flexible waterproofing membrane for sealing buildings against surface water as well as water under pressure. The thin layer enables Servoflex DMS 1K Plus SuperTec to offer constructional advantages. It is also suitable to use as a seal internally and externally on wall surface and floor surface in a composite construction under natural dressed stone (ashlar) coverings and ceramic coverings of new and old buildings. Dries rapidly and can be worked on after 3 hours.