A two-stage seal for forming a static lateral seal and a dynamic lateral seal along a sliding interface between a first sealing surface and a second sealing surface in a pressurized process line, the seal comprising: a body defining a dynamic seal member and a static seal member, wherein each of the dynamic seal member and the static seal member is arranged to sealingly engage the first sealing surface, the first sealing surface arranged to shift in relation to the body; and a spring member carried by the body, said body having a profile including a base member; wherein the spring member is encased within said base member, wherein the dynamic seal member is arranged to form a dynamic seal with the first sealing surface, wherein the static seal member is arranged to form a static seal with the first sealing surface in response to an increased pressure in the pressurized process line and is arranged to release the static seal, wherein the dynamic seal member is arranged to dynamically seal the first sealing surface while the static seal member statically seals the first sealing surface in response to the increased pressure, and wherein the dynamic seal member functions substantially independently of the static seal member; wherein the profile of the body further comprises: a first seal wall extending from the base member in a first direction, the first seal wall defining the dynamic seal member; a groove adjacent the base member and adjacent the first seal wall; and a wiper seal (66, 68) extending laterally from the base member in a second direction, the wiper seal (66, 68) defining the static seal member; characterized in that increased fluid pressure in the groove causes the wiper seal (66, 68) to shift laterally in the second direction. a body defining a dynamic seal member and a static seal member, wherein each of the dynamic seal member and the static seal member is arranged to sealingly engage the first sealing surface, the first sealing surface arranged to shift in relation to the body; and a spring member carried by the body, said body having a profile including a base member; wherein the spring member is encased within said base member, wherein the dynamic seal member is arranged to form a dynamic seal with the first sealing surface, wherein the static seal member is arranged to form a static seal with the first sealing surface in response to an increased pressure in the pressurized process line and is arranged to release the static seal, wherein the dynamic seal member is arranged to dynamically seal the first sealing surface while the static seal member statically seals the first sealing surface in response to the increased pressure, and wherein the dynamic seal member functions substantially independently of the static seal member; wherein the profile of the body further comprises: a first seal wall extending from the base member in a first direction, the first seal wall defining the dynamic seal member; a groove adjacent the base member and adjacent the first seal wall; and a wiper seal (66, 68) extending laterally from the base member in a second direction, the wiper seal (66, 68) defining the static seal member; characterized in that increased fluid pressure in the groove causes the wiper seal (66, 68) to shift laterally in the second direction. a first seal wall extending from the base member in a first direction, the first seal wall defining the dynamic seal member; a groove adjacent the base member and adjacent the first seal wall; and a wiper seal (66, 68) extending laterally from the base member in a second direction, the wiper seal (66, 68) defining the static seal member; characterized in that increased fluid pressure in the groove causes the wiper seal (66, 68) to shift laterally in the second direction.