Abstract: An annular seal is provided. The annular seal is configured to be lubricated, allowing for automatic dispensing in dispensers, without the risk of clogging the dispensers or of building up with other seals. The annular seal has a determined thickness, made of an elastically deformable material, having a seal plane at mid-thickness and an axis of revolution perpendicular to the seal plane, and having: a so-called “inner” surface, turned toward the axis of revolution, and extending over a height of between ? and 22/50 of the thickness on either side of the seal plane, and a so-called “contact” surface extending over the rest of the seal. The seal includes, on the contact surface, at least one spot protuberance.