A seal assembly (200; 400) adapted for use in sealing a joint having a first member (104; 201; 301; 401) pivotable about a rotational axis relative to a second member (102; 251; 403) thereof, the first member (104; 201; 301; 401) including a load ring engagement surface (202; 302; 402) defining, at least in part, an axially-extending seal cavity (206; 300; 406) about the rotational axis, the seal assembly (200; 400) comprising: a seal ring (212; 412), the seal ring (212; 412) having an axial flange (216; 416), extending along the rotational axis, and a radial flange (217; 417), extending along a radial axis (218; 418) perpendicular to the rotational axis; characterised in a load ring (214; 414), the load ring including a seal ring engagement surface (224; 424) and a first member engagement surface (232; 432), the seal ring engagement surface (224; 424) including a radial segment (228; 428) in proximate relationship with the radial flange (217; 417) of the seal ring (212; 412) and an axial segment (226; 426) in proximate relationship with the axial flange (216; 416) of the seal ring (212; 412), and the first member engagement surface (232; 432) adapted to engage the load ring engagement surface (202; 302; 402) of the first member (104; 201; 301; 401), the first member engagement surface (232; 432) including a radial segment (236; 436) and an axial segment (234; 434), the radial segment (236; 436) of the first member engagement surface (232; 432) being in distal relationship with the radial segment (228; 428) of the seal ring engagement surface (224; 424), the axial segment (234; 434) of the first member engagement surface (232; 432) including a convex rounded portion, and the axial segment (226; 426) of the seal ring engagement surface (224; 424) of the load ring (214; 414) extending over at least half the length, measured along the rotational axis, between the radial segment (228; 428) of the seal ring engagement surface (224; 424) and the radial segment (236; 436) of the first member engagement surface (232; 432). a seal ring (212; 412), the seal ring (212; 412) having an axial flange (216; 416), extending along the rotational axis, and a radial flange (217; 417), extending along a radial axis (218; 418) perpendicular to the rotational axis; characterised in a load ring (214; 414), the load ring including a seal ring engagement surface (224; 424) and a first member engagement surface (232; 432), the seal ring engagement surface (224; 424) including a radial segment (228; 428) in proximate relationship with the radial flange (217; 417) of the seal ring (212; 412) and an axial segment (226; 426) in proximate relationship with the axial flange (216; 416) of the seal ring (212; 412), and the first member engagement surface (232; 432) adapted to engage the load ring engagement surface (202; 302; 402) of the first member (104; 201; 301; 401), the first member engagement surface (232; 432) including a radial segment (236; 436) and an axial segment (234; 434), the radial segment (236; 436) of the first member engagement surface (232; 432) being in distal relationship with the radial segment (228; 428) of the seal ring engagement surface (224; 424), the axial segment (234; 434) of the first member engagement surface (232; 432) including a convex rounded portion, and the axial segment (226; 426) of the seal ring engagement surface (224; 424) of the load ring (214; 414) extending over at least half the length, measured along the rotational axis, between the radial segment (228; 428) of the seal ring engagement surface (224; 424) and the radial segment (236; 436) of the first member engagement surface (232; 432).