Abstract: A dispenser for a liquid or pasty product, comprising a casing (1) containing at least one reservoir of product to be dispensed, a pump associated with the reservoir and actuated by a pusher (3) and a dispensing nose (2) of thermoplastic material on the pusher (5) and adapted to receive the product from an outlet of the pump. The nose (2) comprises two sealing lips (4) arranged to spread elastically under the pressure of the product. The nose (2) is molded of one piece with a tongue (5) to which the nose is connected by at least one thin tab (6). The tongue (5) is disposed between the nose (2) and the casing (1) in such a way as to block the pusher until such time as the tongue (5) is torn from the nose (2) by severing the thin tab or tabs (6).