The first layer should fill half the hole.
Wet the damaged area again then apply the plaster in two layers with a putty knife. While the moisture is soaking in, mix the plaster in a container according to directions. After cleaning the hole, moisten the surrounding plaster thoroughly. If the hole is deeper than an eighth of an inch, apply filler in separate layers of this thickness, with ample drying time between, so the filler does not develop cracks.įill deeper holes with patching plaster or plaster of Paris. Wet the plaster then apply the filler with a putty knife wider than the damaged surface.
If the undamaged plaster is sound and the damage is shallow - less than a quarter of an inch deep - repairs can be made by filling with joint compound or spackling. If plaster surrounding the damage can be flexed by pushing against it, this too must be removed unless it can be reanchored firmly.
#Dap plaster wall patch instructions free
To repair these, first remove any fragments of loose plaster then brush the sides of the opening free of dust. Larger cracks can be caused by settling of the building or by impact, which usually is the chief cause of dents and small holes. Before covering filled areas with paint or wallpaper, apply a sealer according to filler instructions then paint over the area with the recommended primer. Sand the area smooth and level, using 100-grit sandpaper wrapped around a flat-surfaced wooden block, or a plastic sanding block. Let the filler dry apply a second layer if cracking or a depression forms. Then smooth the surface and wipe away excess by drawing the knife lengthwise over the area.
#Dap plaster wall patch instructions crack
Then spread joint or spackling compound over the crack with a putty knife.įorce the material into the crack as you apply it by drawing the knife back and forth across the crack until it is filled.
Allow the moisture to soak in for a few moments, which will keep the plaster from absorbing water from the filler and weakening it. Moisten the crack by misting it with water from a spray bottle or a sponge. If possible, undercut the surface of the cracks so the opening is wider inside the crack than at the surface. To fill hairline and other shallow cracks, first use a pointed tool, like the end of a can opener, to widen them enough to accept joint compound or spackling.
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