zack filbert experiments with concrete to produce silakan duduk zack filbert experiments with concrete to produce silakan duduk
sep 23, 2015

zack filbert experiments with concrete to produce silakan duduk

zack filbert experiments with concrete to produce silakan duduk
all images courtesy of zack filbert




wanting to work with the tactile nature of concrete, designer zack filbert embarked himself in the experimentation process of mixing and molding this material, that later resulted in the ‘silakan duduk’ seating sculptures. by looking at how people in indonesia and in other asian countries often sit by squatting, filbert saw the perfect opportunity to create a direct interaction between the person’s feet and the material they’re squatting on.

zack filbert silakan duduk
the pedestal, with the smooth concrete top, is perfect for squatting




the experimentation began when the designer started to think on how he might alter concrete’s traditional properties. after experimenting with a variety of aggregates, he tried adding shredded paper to the mixture. the result was a semi-fluid form of concrete that had sculpting possibilities.

zack filbert silakan duduk
a larger scale piece, or bench, is possible due to a structural paper aggregate




after discovering this, filbert then began to sculpt the material into simple open faced molds, noticing that his hands left some of the surfaces rough and choppy, while the ones facing the mold were completely polished. the contrast between the hand-made and mass-produced processes found in the same object made visible two extremes of the material’s potential. 

zack filbert silakan duduk
the polished surface has a comfortable feel to the bare feet




this play with the material amplified its tactile properties, while creating a unique experience for squatting, sitting, or otherwise touching the concrete.

zack filbert silakan duduk
the full collection of seating sculptures contains a disc, a pedestal and a bench

zack filbert silakan duduk
in the process, shredded pieces of paper are added to the concrete

zack filbert silakan duduk
the following step is casting the pieces in open molds

zack filbert silakan duduk
the open molds allow for sculpting and molding at the same time

zack filbert silakan duduk
the result is a rough surface from the hand sculpting

zack filbert silakan duduk
and a polished surface that results from casting in a mold

zack filbert silakan duduk
children interact with the pieces at a different scale




designboom has received this project from our ‘DIY submissions‘ feature, where we welcome our readers to submit their own work for publication. see more project submissions from our readers here.


edited by: juliana neira | designboom

  • “sit by squatting…” Squatting is done when seating is not available, not by choice. Nice polishing look though.

    sure says:
  • Very interesting concept. Can’t say I’ve investigated if people in those cultures have created any other “no seat chair” for this purpose. Also… can’t say I find it comfortable, but that’s probably because my culture has no squatting customs.

    Great work! Aesthetics are spot on, and just the right amount of “oooh what does that feel like” quality.

    @_identikit_ says:

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