A suspension thrust bearing device having a lower cover, an upper cover and a rolling bearing disposed between the lower cover and the upper cover. The rolling bearing providing a lower ring mounted on the lower cover and an upper ring mounted on the upper cover. The rolling bearing further providing rolling elements disposed between the two rings. The lower cover has a body formed of a rigid material part and a flexible material part forming a seal of the device. The flexible part of the lower cover includes at least one labyrinth sealing lip that cooperates with the upper cover to leave a narrow passage forming a labyrinth seal between one edge of the labyrinth sealing lip and the upper cover and at least one rubbing sealing lip in contact with the upper cover.