Pre-mixed formula for fast, professional repairs in just one application. Use to fill cracks, nail holes, and other holes in plaster, wallboard, wood and stucco. Won’t shrink, crack or sag. No sanding required. Interior/exterior. This lightweight, premixed formula spreads easily for fast, professional repairs to walls and ceilings in just one application. It dries fast, doesn’t need sanding and won’t shrink, crack or flake. Can be painted within minutes and cleans up easily with water.