Chemical compositions for sealing slate; Chemical preparations for sealing; Chemical products for use in sealing; Chemical sealing compounds; Products for sealing brickwork (other than paints and oils); Products for sealing concrete (other than paints and oils); Sealants (chemicals) for the sealing of surfaces; Sealing compounds for use in building (chemical); Sealing liquids for paper; Sealing liquids for prints; Sealing materials (chemical) for porous rock formations; Sealing preparations (chemical); Sealing preparations for floors (chemical)