I am pulling off old “blanket” insulation (i.e. no vapor protection) from concrete basement walls and replacing it with polyiso boards prior to finishing the room.  The blankets were hung with ramset anchors, and removing them is leaving 2-3″ diameter craters (anchors are about 1.5″ deep).  Should I be filling these with hydraulic cerement, or are they shallow enough not to matter (8″ poured wall).