Repairing small cracks in bumper cover

This old 2010 we bought has a couple of small (< 2") cracks at the bottom of the front bumper cover. I stop drilled these. Probably, my daughter caught a snowbank somewhere because one has extended a bit beyond the hole I drilled.

There are a variety of adhesive/putty sorts of repair products sold for the purpose of patching bumper covers. Does anyone have a specific recommendation for/against any of these? Objective is to restore the structural integrity of the bumper cover and keep the cracks from growing. Not too concerned about appearance.