Flexible seal

An elongate seaming device (1, 2, 3) that includes a pair of deformable lips (13a, 13b, 32a, 32b) along its lateral edges and an attachment means (10, 210, 111, 31) for attaching the seaming device along a join between two adjacent surfaces. The lips (13a, 13b, 32a, 32b) are configured to deform against a respective surface on each side of the join along which the device is attached to provide a substantially continuous seam. The attachment means (10, 210, 111, 31) can be in the form of a spine (10, 210, 111). The spine (10, 210) may be L-shaped to receive and engage an upstand (5) and may include a thinned portion (11a) to enable it to be severed to accommodate tiles (7). The spine (111) may include engaging formations (111 a, 111 b) or barbs (211a, 211 b). The attachment means (31) may be in the form of an adhesive strip (31).