Piston rod seal for airlift damper

A top mount for a damper having a piston rod tenon (33) comprises a mount insert (42) and an o-ring (70). The mount insert is disposed on the tenon, and the o-ring is disposed on the tenon and within a cutout (76) of the mount insert. A damper including the top mount, and a method of assembling a top mount, are also disclosed.