In the presence of a sliding door, it is often impossible to use the normal fastening systems. Depending on the situation, it is advisable to fasten the part directly to the walled frame of the door with metal screws, or use shorter screws and anchors if the usable thickness of the facing is adequate. Obviously, the screws must always be of stainless steel. The silicone, insufficient by itself, can help to stabilize the whole structure. It is definitely advisable to choose a model with a framed door.