The ornamental design for a weathersealstrip, as shown and described.
FIG. 1 is a perspective top view of a weather seal strip.
FIG. 2 is a perspective bottom view of the weather seal strip.
FIG. 3 is a top view of the weather seal strip.
FIG. 4 is a bottom view of the weather seal strip.
FIG. 5 is a front end view of the weather seal strip.
FIG. 6 is a rear end view of the weather seal strip.
FIG. 7 is a left side view of the weather seal strip; and,
FIG. 8 is a right side view of the weather seal strip.
The weather seal strip of the present design is depicted in a “broken-away” manner. The appearance of any portion of the article between the break lines forms no part of the claimed design.