Panel, in particular floor panel, having sealing function, and panel system

A panel, especially a floor panel, comprising:

• a plate forming a core;
• an upside;
• an underside;
• a first side edge;
• a second side edge arranged opposite the first side edge;
• a first locking element formed on the first side edge;
• a second locking element formed on the second side edge, wherein the first locking element and the second locking element are designed to correspond to each other;
• a first abutment surface formed on the first side edge, the first abutment surface being adjacent to the upside;
• and
• a second abutment surface formed on the second side edge, the second abutment surface being adjacent to the upside,
• wherein the first locking element and the second locking element are able to establish a horizontal locking in a locking position, and
• wherein the material of the side edges corresponds to a core material of the plate,
• wherein
• a deformation element is arranged at least in sections on at least one of the abutment surfaces, wherein the deformation element is formed from the material of the side edge, wherein the deformation element protrudes with respect to the at least one of the abutment surfaces,
• a deformation section corresponding to the deformation element is provided on another abutment surface of the at least one of the abutment surfaces, wherein the deformation section runs flat with respect to the other abutment surface, and
• the deformation element and the deformation section are able to be deformed at least partly in the locking position due to a contact of the deformation element with an opposite abutment surface.