A dynamic mixer for a plurality of fluid components contains a housing and a rotor element which is rotatably arranged in the housing, with the housing having one inlet opening for at least one component each and at least one outlet opening. A ring-shaped intermediate space is provided between the rotor element and the housing in which a mixing element connected to the rotor element is arranged. A seal for sealing the rotor element in the mixer housing is provided at the bearing location of the rotor element in the housing.