The surface of the structure to be protected shall be cleaned of plaster, weak concrete, and dense cement laitance by sandblasting and/or cleaning with wire brushes, scrapers, or a demolition hammer. For cleaning large surface areas, the use of high-pressure water jet equipment is recommended. In case of не достижения If the required cleaning effect is not achieved, other cleaning methods may be used, including т.ч.If the required cleaning effect is not achieved, other cleaning methods may be used, including chemical treatment of the surface with acidic and saline solutions.