Hydrochim E is designed for waterproofing surfaces on façades, residential buildings and premises for collective or industrial use. On exteriors: it prevents penetration by cracks and micro-cracks in rustic rendering, chimney flashings, terraces and window sills. It treats all soiling caused by atmospheric dust, sludge, carbon monoxide, smoke, etc. It significantly slows the formation of micro-vegetation on vertical and, to a lesser extent, horizontal surfaces.