◆ Concrete

Classical torso sculpture mold

Cast a 140 mm classical male torso in concrete or plaster. Silicone mold kit.

3D render of the classical torso master fused on its printed charcoal base, between the orange and blue hugging shell halves
Concrete Pro early access

A classical male torso 140 mm tall and about 124 mm across the shoulders, in the style of an ancient marble fragment: broad chest, carved abdomen, the neck and arms broken off. It stands on the flat cut at its waist, so it sits on a shelf, a desk or a garden wall with no plinth.

The mold is made with the hugging-shell mode of our silicone mold maker, the mode the site itself picks for this shape: every muscle is an undercut that would lock a rigid mold, and silicone peels out of them. Print the base with the torso fused onto it and the two shell halves, pour about 871 ml of silicone, and cast in the flexible mold that comes out.

A fine concrete gives a heavy, stony sculpture; casting plaster or Jesmonite gives a crisp white one. The same mold takes candle wax for a large statement candle.

The zip carries every printed part, the torso master as its own STL, the tool's own print-settings sheet and a recipe file for the generator.

Shown as a 3D render of the printed mold parts pulled apart around the master, not a photo.

What you need

  • About 930 ml of silicone (mix it in one batch)
  • About 648 ml of fine concrete, casting plaster or Jesmonite per sculpture
  • Tape or a hot glue gun for the outside seams
  • Mold release for concrete

How to cast it

  1. Print the base, which has the master already fused onto it, and the two shell halves. No supports.
  2. Stand the shell halves on the base around the master and hold the seams shut with steel binder clips. The seats for them are built into the shell.
  3. Tape the outside seams or run a bead of hot glue along them, because silicone finds every gap.
  4. Mix 930 ml of silicone in one batch, pour it into the open top in a thin stream, and fill level with the rim.
  5. Once it has cured, unclip the shell and slide each half off SIDEWAYS, not upward: the master is wider above its foot, so the base rib is left open for that. Then peel the silicone off the master. That silicone is your mold.
  6. Set the silicone back in the shell to keep its shape, and cast into it through the opening the base left.
Print details
Cast materialConcrete
Total print time34 h 33 min
Printed parts4
Size (W x D x H)137 x 112 x 156 mm
Filament~495 g
Layer height0.2 mm
Infill15%
SupportsNot needed
PrinterSliced with PrusaSlicer 2.7.2: 0.4 mm nozzle, 0.2 mm layers, 3 walls, 15% infill, MK3-class speeds. These parts only hold liquid silicone while it cures, so PLA is fine. No supports.
DownloadZIP: 4 printed parts (STL) + sculpture master (STL) + print sheet + recipe
Added2026-09-24

Pro early access until October 24, 2026, then free with any account.

Free for personal use. Selling the pieces you cast needs a commercial licence (Pro or Founder); passing on the file itself is not permitted on any plan. Full terms.

Made with the free silicone mold maker generator. Upload your own model and get the same kind of mold built around it, in your browser.

New to casting? Read the silicone mold maker guide.

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Questions about this design

Concrete or plaster for the torso sculpture?

Fine concrete with no gravel gives the classic stone look and survives outdoors; leave it a day before you demold. Casting plaster or Jesmonite is lighter and whiter and ready in about an hour. Either way, brush a thin first coat into the mold so it reaches into every muscle, then fill the rest and tap the mold for a minute.

Does the torso mold trap air anywhere?

One small spot: about 1 ml of air stays in a pocket at one side, about 55 mm up, where it cannot rise to the opening. Tilt the mold a little while you pour so the air can climb out, or cut a thin vent in the cured silicone from that spot up toward the opening before your first cast.

Can I make a candle from the torso mold?

Yes. It takes about 648 ml of pillar wax, so it is a big decorative candle. Use a wick rated for a 100 mm pillar and thread it through the silicone at the top of the torso before you pour.

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