ᐅ Items falling behind the back panel of Kallax shelves – any ideas for solutions?

Hello everyone, I have the following issue with my Ikea Kallax shelf: smaller items like collectible figures, decorative objects, or even papers keep falling behind the back panel of the shelf. The back panel is made of a thin board attached at the rear and leaves a small gap at the bottom, through which everything can slip. Therefore, I am looking for practical, preferably reversible solutions to prevent things from “slipping through.” Does anyone have a clever idea or a practical method to reinforce or seal the back panel so that items no longer fall behind it, without having to completely rebuild or damage the shelf? I’m open to all suggestions, including DIY tips or material recommendations. Thanks in advance!

Hey Gero38, I know that problem all too well! 🙂 I found a simple solution that works for me: I cut thin neoprene mats (these can be found as table protectors or craft materials) to size and attached them to the bottom of the back panel using double-sided tape. The mat is flexible enough to fully cover the gap and reliably prevents small parts from falling through. Plus, it looks neat and can be removed without leaving any residue if you want to rearrange later. Maybe this could work for your shelf too! :-)

Another option would be to reinforce the back panel with an additional board, such as thin plywood or MDF, cut precisely to size and either screwed or glued from the inside to the back panel. This increases stability and closes the gap between the shelf and the back panel. It is important that the board is not too thick so that the Kallax box still fits well in the shelf. Alternatively, you could apply self-adhesive sealing strips (available at hardware stores, for example, furniture door seals) to close the gap. This way, the shelf remains largely original.

Hello Gero38, your concern is easy to understand, since the back panels of Kallax units don’t fully seal. In addition to the solutions already mentioned, I can suggest the following: for example, you could attach transparent acrylic glass (Plexiglas) of the appropriate width and height behind the back panel, either glued or clamped. This would completely cover the opening without affecting the appearance. Additionally, it is durable and easy to clean. For smaller items, you could also use a thin plastic sheet or self-adhesive clear film, which is flexible but airtight. It’s important that the solution is reversible in case you want to remove the back panel later.

I simply glued felt strips to the bottom edge of the back panel. They fill the gap well and prevent objects from falling through. It doesn’t cost much and, in my opinion, looks neat.

That's brilliant! 🙂 I had the same problem and simply used cable ties from behind to pull the back panel against the shelf. This provides a firm hold and closes the gap. You can easily cut or replace the cable ties. Also, it's very cheap and quick to do!