Abstract: A one-piece wiper device for an applicator assembly for paste-like cosmetic product that includes an applicator provided with a gripping rod and a means for applying said cosmetic product; a container having a neck in which said applicator slides along a longitudinal axis XX. The wiper device has a cylindrical shape adjustable inside the neck and is provided with a first flange for attachment thereof on the edge of the neck and a second flange for attachment thereof on an inner shoulder of the neck and a lip protruding inside said container. The device according to the invention also includes an outer external protrusion externally supporting at least one additional element suitable for coming into contact with the inner surface of the shoulder of the neck when the device is engaged on said neck.