Grout sealants (chemicals); sealant mastics for use in industry; sealants (chemicals) for the sealing of surfaces; urethane floor sealants; water sealant preparations (other than paints); 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 preparations for floors (chemical); sealing materials (chemical) for porous rock formations; urethane floor sealants