An expansion joint profile system for producing an expansion joint in the manufacture of a rigid floor covering includes a profile (1) comprising a first profile element (3) having a first support leg (5) provided for bearing on a substrate (18) and a first abutment leg (6) projecting upwardly therefrom. A second profile element (4) has a second abutment leg (6). A connection element (9) is formed in a ridge-like manner and extends in the longitudinal direction between the two profile elements (3, 4) and connects them to one another in the lower region. An insertion opening (10) is formed between the abutment legs and is open at the top and extends in the longitudinal direction (L). A sealing element (11) is formed in a T-shaped cross-section with a downwardly projecting insertion leg (12) for insertion into the insertion opening (10).