Abstract: A split seal (1) having an annular cross-section and a central axis (X) comprises at least two components (2,3) of arcuate form, each component having two end portions (4,4',5,5') and each end portion having a surface (F1,F2) formed and arranged for mating engagement with a respective complementary end portion surface of another of the components. Each end portion surface (F1,F2) extends in an indirect manner over one of the radial width (.delta..sub.r) and the axial length (l) of the seal and each end portion surface (F1,F2) extends substantially continuously in non-reentrant manner over the other one of the radial width (.delta..sub.r) and the axial length (l) of the seal so that the matingly engaged components are substantially smoothly, relatively translatable in one of a generally axial direction and a generally radial direction. In a preferred embodiment each end portion surface (F1,F2) extends in a zigzag manner.