Chemical products for use as additives for building materials; chemical products for use in the manufacture of building materials; chemicals for use as additives in building materials (except paints); coatings for the finishing of masonry (chemicals) (other than paints or building materials); coatings for the finishing of surfaces (chemicals)(other than paints, oils or building materials); coatings to protect concrete from water (other than building materials, paints or oils); coatings to protect masonry building walls from water (other than building materials, paints or oils); coatings to protect stone from water (other than building materials, paints or oils)