Cleaning of floor surfaces; Application of protective coatings; Installation, maintenance and repair of protective coatings for floors; Restoration in the field of grout surfaces; Application of coatings for others, namely, applying restorative, bonding and protective coatings to grout; Restoration in the field of grout surfaces, namely dirt, odor, stain, contaminant, and mineralized matter extraction and removal, chemical and mechanical etching and sealing, restorative bonding, surface prepa...