A press seal (1) with an elastomer body (2) includes a press body (9, 10) which can be pressed against the elastomer body (2) by tightening a clamping bolt (4) and as a result, the elastomer body (2) is sealed on a line. The pressing body (9, 10) includes a display element (11) which can be visible in a display range (18) when a clamping state of the elastomer body (2) is reached. The pressing body (9, 10) includes a first (13) and a second press body part (14) movably mounted with respect to each other in an axial direction (3) parallel to the longitudinal axis (7) of the clamping bolt (4) such that when the elastomer body (2) is in the clamped state, it adopts a relative position modified with respect to the non-clamped initial state, which can be read on the display element (11).
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