Corrugated gaskets are universally applicable. Due to their wide production possibilities (rings, ovals, rectangles, etc.) including locking openings and in various combinations of corrugations, the number of applications for these gaskets gradually grows. The corrugated gaskets can have their surfaces fully or partly treated. Even in the case of unworked flanges, satisfactory sealing effect can be achieved by a proper selection of the superimposed soft material.