As you can see from the above, the standard encapsulation cap leaves an air gap between the cap face and wedge face that can trap air, moisture and dirt.  As this cap relies on an O-ring for sealing against the internal metal ring, there is no positive "snap attachment" at the cap and anchorage.

The PocketCap™ not only eliminates the air gap at the face of the wedge set, but also pushes grease between the wedges to the back of the anchor (Depth depends on actual cut length of strand).  This leaves the encapsulation nearly void-free.

By designing the PocketCap™ to cause the annular space between the cap wall and the strand to be less than the cross sectional area of the strand itself, the grease is "pumped" toward the face of the anchor and wedge set by virtue of the "hammer blow" to the cap.  At this time, most air will escape before the final seal is completed.  This works best with clean, proper length cuts, such as those resulting form a PocketShear™ cut.

This result is the same for any Bonded or Unbonded tendon anchor.