Abstract: A joint member (1) is substantially elongated and has a stabilizing parts (2, 3) which retain the joint member in a desired orientation in use. Seal members (6, 7) are provided on the joint member and engage sides of an aperture into which the joint member (1) is positioned. The joint member includes an insertion part (5, 8), or divider plate, which enables the seal members (6, 7) to be placed in a desired position in use. The method of providing a nosing on edge faces of cementitious members includes positioning the divider plate (5) between the edge faces and inserting settable material (14, 15) between the elongated divider plate (5, 8) and the edge faces, then allowing the settable material to set.