Slot covers. Slot covers for aluminium extrusions. That’s the topic for today.

Just the other day I was thinking about sealing against a 2020 extrusion slot. In a sort-of air-tight way. And after tinkering and ordering a bunch of samples of things that could work, I had a second look into one of the options: This could work for pure looks as well.

You see, the classic 40×40 (or larger, like 40×80, 40×160 if you like it beefy) aluminium profiles have readily available sealing strips against dust. Depending on exact slot type (since there are a couple of manufacturers/specifications), the typical slot to cover is like 8mm wide and goes 14ish millimeters deep. […]