Funcosil AS is a reactive siloxane-acrylate combination with hydro-phobizing and surface strengthen-ing properties. It proviedes strong long term protection against weather and UV-light and the penetration of water from pre-cipitation into the building material. It has a strengthening effect on friable, sanding building material surfaces and also intensifies the colour of many cementitious build-ing materials (clinker, exposed aggregate concrete, brick, pre-cast stone).