[Thomas Sanladerer] wanted to create some molds using 3D printing for concrete and plaster ... you know you need an extruder that has a contained path. [Tom] borrowed a printer, but it didn ...

That’s not the only use of the technique though, and perhaps one of the simplest is to use a 3D-printed mould for casting concrete. It’s what [ArtByAdrock] is doing in their latest video ...