Polyfilla Trade Easy Sand Interior Filler is an ideal sand filling choice to mend and fill cracks and holes in walls or floors, and can be used on ceilings, window panels and frames, skirting and around doors. It dries quickly and can be sanded down to give a perfect smooth finish that can be polished and painted. It will not crack or shrink and is tolerant for nailing, hammering and screw insertions.