A system, comprising: a first component including a first surface, a substantially radially extending component cavity disposed in the first component, and defining a substantially radially extending first component rail; a second component including a second surface, the first component and second component each being disposed about an axial centerline, the second component disposed adjacent the first component and defining a seal cavity therebetween; and a seal for sealing a space defined by the first and second adjacent components, the seal comprising: a retaining ring including a retaining ring base and first and second substantially radially extending retaining ring legs (232, 234) extending from the retaining ring base and defining a substantially radially extending retaining ring cavity; and a seal ring including a substantially radially extending seal ring base and a substantially axially extending seal ring leg extending from the seal ring base, the seal ring base at least partially disposed within the retaining ring cavity; and wherein at least a portion of the first retaining ring leg is disposed within the component cavity, and wherein, in use, pressure within the seal cavity may urge the seal to seat against the first surface, the second surface and the first component rail, characterized in that the first and second components are axially-adjacent segmented or full hoop turbine components (202, 204) which may move axially, radially, and circumferentially relative to one another about the axial centerline, the axial centerline being an axial centerline of a turbine engine. a first component including a first surface, a substantially radially extending component cavity disposed in the first component, and defining a substantially radially extending first component rail; a second component including a second surface, the first component and second component each being disposed about an axial centerline, the second component disposed adjacent the first component and defining a seal cavity therebetween; and a seal for sealing a space defined by the first and second adjacent components, the seal comprising: a retaining ring including a retaining ring base and first and second substantially radially extending retaining ring legs (232, 234) extending from the retaining ring base and defining a substantially radially extending retaining ring cavity; and a seal ring including a substantially radially extending seal ring base and a substantially axially extending seal ring leg extending from the seal ring base, the seal ring base at least partially disposed within the retaining ring cavity; and wherein at least a portion of the first retaining ring leg is disposed within the component cavity, and wherein, in use, pressure within the seal cavity may urge the seal to seat against the first surface, the second surface and the first component rail, characterized in that the first and second components are axially-adjacent segmented or full hoop turbine components (202, 204) which may move axially, radially, and circumferentially relative to one another about the axial centerline, the axial centerline being an axial centerline of a turbine engine.