Seal for a turbomachine, used to provide the seal between two elements of the turbomachine in rotation with respect to one another and being of revolution about the axis of the seal, comprising: - at least one sealing ring element of a turbomachine arranged about a turbomachine axis, being annular about the axis of the seal and intended to be supported by one of the two elements of the turbomachine in rotation with respect to one another, the sealing ring element being made from an abradable material and comprising at least one sealing portion able to engage with at least one sealing wiper, said at least one sealing portion comprising a first area (6p1) and a second area (6p2) adjacent to the first area (6p1) in the direction of the axis of the turbomachine, with the inner surface of a first area (6p1) being at the same radial distance from the axis of a turbomachine for any sealing surface portion, with the sealing portion comprising an annular cavity which opens into an inner surface of the second area (6p2) and extends into the first area (6p1). - at least one wiper, annular about the axis of the seal, intended to be supported by the other of the two elements of the turbomachine in rotation with respect to one another, said at least one wiper comprising a downstream lateral wall, intended to come opposite a downstream lateral wall of said annular cavity, and, through observation as an axial section, the angle (α) formed between the downstream axis of the cavity (Cv) and the axis (Ci) along which extends the inner surface of the first area (6p1) associated with said annular cavity being greater than or equal to the angle (β) formed between the axis (Lv) along which extends the downstream lateral wall of said at least one wiper and the axis (Ci) along which extends the inner surface of the first area (6p1) associated with said annular cavity, in such a way that said at least one wiper can penetrate into said annular cavity, characterised in that the annular cavity defines an upstream lateral wall and/or a downstream lateral wall forming an angle (α) with the inner surface of the first area (6p1) strictly between 0 and 90°, in such a way that a portion of the abradable material of the first area (6p1) is radially superimposed on a portion of the annular cavity. - at least one sealing ring element of a turbomachine arranged about a turbomachine axis, being annular about the axis of the seal and intended to be supported by one of the two elements of the turbomachine in rotation with respect to one another, the sealing ring element being made from an abradable material and comprising at least one sealing portion able to engage with at least one sealing wiper, said at least one sealing portion comprising a first area (6p1) and a second area (6p2) adjacent to the first area (6p1) in the direction of the axis of the turbomachine, with the inner surface of a first area (6p1) being at the same radial distance from the axis of a turbomachine for any sealing surface portion, with the sealing portion comprising an annular cavity which opens into an inner surface of the second area (6p2) and extends into the first area (6p1). - at least one wiper, annular about the axis of the seal, intended to be supported by the other of the two elements of the turbomachine in rotation with respect to one another, said at least one wiper comprising a downstream lateral wall, intended to come opposite a downstream lateral wall of said annular cavity, and, through observation as an axial section, the angle (α) formed between the downstream axis of the cavity (Cv) and the axis (Ci) along which extends the inner surface of the first area (6p1) associated with said annular cavity being greater than or equal to the angle (β) formed between the axis (Lv) along which extends the downstream lateral wall of said at least one wiper and the axis (Ci) along which extends the inner surface of the first area (6p1) associated with said annular cavity, in such a way that said at least one wiper can penetrate into said annular cavity,