The ornamental design for an endcapseal, as shown and described.
FIG. 1 is a front right perspective view of an end cap seal in accordance with the claimed design;
FIG. 2 is a rear right perspective view of the design of FIG. 1;
FIG. 3 is a front elevation view of the design of FIG. 1;
FIG. 4 is a right side elevation view of the design of FIG. 1, the left side elevation view is a mirror image thereof;
FIG. 5 is a top plan view of the design of FIG. 1, the bottom plan view is a mirror image thereof; and,
FIG. 6 is a rear elevation view of the design of FIG. 1.
The dash-dash broken lines in the figures represent unclaimed subject matter and form no part of the claimed design.
The dot-dash broken lines in the figures immediately adjacent the surface shading represent a boundary between claimed and unclaimed subject matter and form no part of the claimed design.