◆ Soap
Wave soap bar mold
An 88 mm soap bar with a rippled face, as a silicone mold from a printed box.
◆ Soap
An 88 mm soap bar with a rippled face, as a silicone mold from a printed box.
A soap bar 88 x 60 mm and about 26 mm thick with a diagonal ripple across a gently crowned face and a flat back. The ripple reads from every angle and gives a wet bar some grip.
Made with the box mode of our silicone mold maker, which the site's own mold advisor ranks first for a low, wide shape like a bar. Print the base with the bar fused onto it face up, two walls and two clamps, pour about 355 ml of silicone, and the cured block is an open-backed soap mold: pour, level off the back, pop out.
The zip carries every printed part, the soap 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.
Print the base with the master fused onto it, the two walls and the two clamps.
Stand the base on the table. Set each wall down a few centimetres out from it and slide it in over the table until the ridge round the base sits in the groove at its foot, then slide the clamps down over the seams. Once they are on, the walls cannot lift, and the ridge seals the bottom.
Mix 387 ml of silicone in one batch and pour it into a corner, letting it rise around the master until it covers the top.
Once it has cured, take the clamps off, slide the walls straight out and pull the silicone block off the master. That block is your mold.
Turn the block over: the opening is the flat back of the bar. Pour your soap, level it, and pop the bar out once it has set.
Print details
| Cast material | Soap |
|---|---|
| Printed parts | 5 |
| Size (W x D x H) | 116 x 88 x 62 mm |
| Print bed needed | 138 x 88 mm, 62 mm tall |
| Filament | ~205 g |
| Layer height | 0.2 mm |
| Infill | 15% |
| Supports | Not needed |
| Download | ZIP: 5 printed parts (STL) + soap bar master (STL) + print sheet + recipe |
| Added | 2026-09-24 |
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.
Free download. Opens the Thingiverse listing in a new tab.
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.
New to casting? Read the silicone mold maker guide.
Both. Silicone takes the heat of melt-and-pour and the alkalinity of cold-process soap. Spritz the surface with alcohol after pouring melt-and-pour to pop the bubbles on the back.
About 355 ml, so mix 387 ml in one batch. The exact figures are in the tool's print-settings sheet inside the zip.
Print and pour the kit two or three times, or upload the master to the silicone mold maker and scale it to make a set in different sizes.
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