The invention relates to a device for co-metering liquid and/or pasty products, including: a first metering unit (41) for metering a first product a second metering unit (42) for metering a second product (P2) a nozzle (B) including a first duct (1) supplied by the first metering unit (41) and opening out into a first orifice (11), a second duct (2) supplied by the second metering unit (42) and opening out into a second orifice (21), and a third duct (3) opening out into a third orifice (31), the device being configured such that the third duct (3) is supplied by the first and second metering units (41, 42), such that a mixture of the first and second products is discharged by said third orifice (31). The invention also relates to an associated metering method.
