Hypoallergenic, solvent-free, two-component thixotropic polyurethane adhesive to be used in a ratio of 11.25:1.25 with a specific catalyst. For bonding all types and sizes of parquet flooring to all types of substrates, particularly suitable for shipbuilding. It can also be used in the production of sandwich panels, brick roofing, for bonding ceramic materials, fiber cement, polystyrene or polyurethane foam, extruded polystyrene or polyurethane, and metals.