Cold-formed sheet steel profiles with a U-shaped cross-section in accordance with EN 14195 and corrosion protection C5M for use as an edge profile for suspended AQUAPANEL® / Drystar ceilings. UD profiles C5M for wall connections in conjunction with CD ceiling profiles C5M. The corrosivity categories C3 and C5-M refer to the classification according to DIN EN ISO 12944-2:1998-07 and DIN 55634-1:2018-03.