We bought a house with exposed concrete walls. Unfortunately, the walls were probably often cleaned with a pressure washer, so that the surface has been roughened significantly and moss and dirt firmly ate faster. After cleaning with the algae / moss remover of MEM, we applied the stone impregnation. The specified square footage was fine with us. After the first heavy rain we have already seen that the water is no longer so quickly soaked the concrete. However, we have decided to impregnate, and now the rain drips from formally a second time. Only after persistent heavy rain, the concrete is wet. New algae / moss lining, we do not have in a month. You should only really when applying the manufacturers instructions must be observed excess funds wipe, otherwise remain darker edges. Although the agent is not exactly cheap, but because it is for 1 year gives a good vision, we would buy it again next year.
