SteinRein 915 is a cleaning agent for concrete, natural stones and cementitious surfaces. The highly active concentrate cleans porous deep. Typically used for thorough cleaning of facades, industrial floors, clinkers and pavement. Surfaces cleaned with Steinrein 915 will be additional hardened and tempered. This additional benefit makes surfaces more stable and better in just one working step. Steinrein 915 is not suitable for marble, chalky stones and shouldn´t used on paint or lacquer.