The invention relates to an elastic sealing element in the form of a bellow. Said sealing element can be used to seal the contact area between at least two components which can move in relation to each other. The inventive device has low-elastic face areas and a deformation area with greater elasticity than the face areas. The inner side of the deformation area facing the mobile components defines a chamber accommodating lubricants. At least one excess pressure discharge device (14) is arranged in one of the two low-elastic face areas (6 or 7). The excess pressure discharge device (14) has at least one discharge outlet (15) connecting the lubricant chamber (11) to the outside of the sealing element (1) and a closing element (16) covering said outlet. The closing element (16) and the sealing element (1) are designed as a single piece. Said closing element closes the discharge outlet (15) until an excess pressure limit has been reached in the lubricant chamber (11) by virtue of the elasticity of the material forming the sealing element.