The included screw hooks with the plugs are suitable for compact ceilings, suspended ceilings or substrates with small cavities (like bricks).

However, if drilling produces a large, loose hole, you need to prepare the hole with some filling material.

“UHU Repair All Powerkitt”is a kneadable, soft material. By kneading, the material is “activated”. It can be applied to the hole easily, and after inserting the screw (without the plug), it cures and hardens.