Step 5 · Prime the Repaired Area

Once the sanded area is clean and free of dust, apply a coat of drywall primer. Primer helps to seal the porous patching material, preventing the topcoat of paint from being absorbed unevenly, which can result in a visible difference in sheen or color. Use a brush or roller to apply the primer, covering the entire patched area and extending slightly onto the surrounding wall for proper blending. Allow the primer to dry completely according to the manufacturer's instructions.