An anchor assembly for use on a tension member in a post-tensioning concrete application, the anchor assembly may comprise an encapsulated anchor body, the encapsulation defining front and rear encapsulation extensions, a rear nut engaging the rear encapsulation extension, a cap engaging the front encapsulation extension and having a cap extension, a front nut engaging the cap extension, wherein placement of a tension member in the anchor assembly results in definition of front and rear annular spaces, and front and rear seal positioned in the front and rear annular spaces, respectively. The seals may be split seals. A method includes positioning a tension member in the bore, decoupling the cap from the front encapsulation extension, positioning at least one wedge in the frustoconical inner chamber, recoupling the cap, decoupling the front and rear nuts; positioning a seal in each annular space, and recoupling the front and rear nuts.