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Geosynthetic products for insulation and sealing purposes, in particular in the form of non-woven fabrics, plastic webs, geomembranes and geogrids; composites in the form of geosynthetic clay sealing materials and clay sealing systems composed thereof for use in geotechnics and hydraulic engineering; geofoils and sheets made from geosynthetics for sealing purposes; goods of plastic (semi- finished goods), in particular foils, fabrics (not for textile or building purposes); non-woven fabrics [not for textile use] for insulating and sealing purposes; grids for insulating purposes and sealing membranes [including in the form of composite materials], which are provided with coatings and/or foils in strips or over the entire surface that are suitable for reflecting radiation suitable for radar measurements; insulating geomembranes for use in geotechnics and hydraulic engineering.Building materials, not of metal, in particular geosynthetic products, geotextiles and geogrids, and composites made therefrom, also in the form of sacks and tubes, for use in geotechnics and hydraulic engineering for reinforcement, drainage, filtration, protection, separation and boarding; building materials, not of metal, namely nonwovens, foils, webs, nets and grids, and composites made therefrom, optionally containing additional mineral fillers, in particular bentonite, mats of building materials, in particular drainage mats and anti-erosion mats; reinforcement and drainage material made of plastic for building, joint tapes made of plastic for building, in particular joint tapes for connecting plastic sealing webs, preferably using welding technology; geosynthetic products for construction purposes in the form of geofoils, geotextiles and geogrids [including in the form of composite materials], which are equipped in strips or over the entire surface with coatings and/or foils that are suitable for reflecting radiation suitable for radar measurements.Filtering materials of textile, namely nonwovens, endless filter mats of chemical fibres, other than for machine and apparatus construction, and for use as filter media for gas and liquid filtration in filter apparatus and for road construction.Roofing, in particular laying and renovating roofs covered with foils or using foils; insulation work with plastic or plastic- containing foils for sealing structures in building construction and civil engineering, in particular bridges, containers, tunnels; isolation of basins, ponds, dams, ditches and landfills, retention basins and clarifiers; installation of seals for groundwater and soil protection, in particular installation of special seals for landfills for domestic, industrial and hazardous waste, tank farms, gas stations, traffic routes, storage and treatment facilities for contaminated soil, water and liquid manure basins, water bodies, dams and dykes, for buildings; lining of swimming pools with sealing materials; creation of artificial lakes and ponds; carrying out pipeline and shaft construction work; repair of large metal tanks for liquid fuels.Engineering advice in the field of geotechnics, especially in earthworks, foundation engineering, hydraulic engineering and landfill construction.