A bead-lock section for use in a first drum half between a crown-up section and a turn-up section, includes a bead-lock seal arranged to extend over and seal the bead-lock member in an air-tight or substantially air-tight manner. The bead-lock seal has a first end that is arranged to be mounted in an air-tight or substantially air-tight manner to the crown-up section and a second end that is arranged to be mounted in an air-tight or substantially air-tight manner between the bead-lock member and a mounting body directly adjacent to the bead-lock member. The bead-lock seal is arranged to slide along the mounting body when the bead-lock member is moved between the release position and the bead-lock position.