I claim the ornamental design for a silicone-handled paintbrush, as shown and described.
FIG. 1 is a perspective view of a silicone-handled paintbrush showing my new design;
FIG. 2 is a left elevation view thereof;
FIG. 3 is a right elevation view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a back elevation thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines in FIGS. 1, 2, 3, 4, 5, and 7 depicting a ferrule and bristles are for the purpose of illustrating portions of the article that form no part of the claimed design.