Delta Multi-Purpose Filler Powder is a specially formulated traditional powder filler ideal for repairs to plaster, plasterboard, wood, brick, stone and most other building materials. Easy to mix and simple to use, it has superb adhesive properties that keeps the filler firmly in place when dry. Provides a smooth surface for over painting or wallpapering. May be sanded when set. Dries rock hard to take nails or screws. Excellent for exterior use, providing it is sealed with paint or varnish when dry.