A seal is provided for a hole in a sheet. The clamped hole surface has an articulated line, which divides the hole surface into a first partial surface and a second partial surface inclined relative thereto, exhibiting the following features: a sealing surface for the hole, the geometry of which corresponds to the hole geometry; an elastic element secured to the sealing surface; and the elastic element is incorporated into the hole abuts on one side (e.g., interior) of the sheet, pressing the sealing surface against a second side (e.g., exterior) of the sheet.