Abstract: An electrolysis cell is provided comprising an anodic bottom, an anode assembly and a cathode assembly, whereby there is provided a hydraulic and electrically insulating gasket assembly between the cathode assembly and a support plate for the anodes, which gasket assembly eliminates the need for lead and asphalt coatings or concrete support troughs. The insulating gasket assembly comprises a rigid portion having an upper face and a lower face, each of thefaces being provided with at least one groove in which is placed a flexible gasket which protrudes above the face of said rigid portion, with said grooves being staggered opposite each other so that said rigid portion rests on the lower portion of the cell.