[Thomas Sanladerer] wanted to create some molds using 3D printing for concrete and plaster. He used a delta printer with flexible filament and documented his process in the video below. If you ...

$59 at Global Industrial This pressure washer-compatible concentrated concrete cleaner will eliminate mold, mildew and algae. It also works on common concrete stains like oil and grease.

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 ...