Abstract: The bonding system for auxiliary door seals contains a receiving means for detachably holding a mounting template whose peripheral edge at the narrow side is provided with a plurality of spaced-apart trough-like suction members which are connectable via a joint line and a connection valve to a source of vacuum to suck in the auxiliary door seal placed on the peripheral edge. The receiving means is guided together with the mounting template by a slide means below and past two plasma irradiation means and below two metering devices which apply a predetermined amount of a viscous adhesive to the auxiliary door seal. Each of the metering devices has a double seat valve which releases either the connection between a cartridge and a displacement-type metering means or the connection between the displacement-type metering means and the outlet opening of the valve means.