◆ Concrete
Monstera leaf concrete stepping stone mold
A round stepping stone, 195 mm across, with a monstera leaf pressed into its face. Cast in concrete straight in a printed tray.
◆ Concrete
A round stepping stone, 195 mm across, with a monstera leaf pressed into its face. Cast in concrete straight in a printed tray.
A round concrete stepping stone 195 mm (7.7 inch) across and 30 mm thick, with a big monstera leaf pressed 2.5 mm into its face: the cordate outline, the deep splits and the row of holes beside the midrib left at stone level, and the midrib and side veins pressed 1 mm deeper again, with the stalk running off toward the rim. At about 1950 g it sits firm in a lawn, a gravel path or a plant bed.
Made with our tray mold generator in its rigid tray mode: print the tray, wipe in release and pour concrete straight in, no silicone. The stone is cast face down, so the leaf comes off the tray floor, and every step in the imprint has a sloped side, so the stone lifts out with the veins crisp. The tray is 213 mm square and fits a 220 mm printer bed.
Paint the leaf green with an outdoor masonry paint and leave the stone grey, or dry-brush the veins white. Smaller than a paving slab, it works as a garden accent, a stepping stone through a flower bed, a stand for a pot or a wall plaque. The zip carries the tray exactly as the tool exported it, the stone on its own as an STL, the master uploaded to the tool and a print and pour sheet.
Shown as a 3D render of the printed tray with a concrete stone in front, not a photo.
Print the tray as exported, cavities up, no supports. PLA is fine.
Wipe a thin film of mold release or cooking oil into every cavity, including the grooves.
Mix a fine concrete or Jesmonite to a thick pour, fill each cavity, and vibrate it out: tap the tray on the table or hold a sander against the side for a minute until no more bubbles rise.
Cover the tray and let it cure for 24 hours, then flex the tray and tip the pieces out. Sand the back flat, and seal them once they have dried for a few days.
Let the stone cure for a full week before anyone steps on it, paint the leaf if you like, and seal the face and the edge before it goes outside.
Print details
| Cast material | Concrete |
|---|---|
| Printed parts | 1 |
| Size (W x D x H) | 213 x 213 x 38 mm |
| Print bed needed | 214 x 214 mm, 38 mm tall |
| Filament | ~431 g |
| Layer height | 0.2 mm |
| Infill | 15% |
| Supports | Not needed |
| Download | ZIP: printed tray (STL) + one stepping stone (STL) + tool master (STL) + print and pour sheet |
| Added | 2026-09-27 |
Made with the free Tray mold 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 ice cube tray mold guide.
Yes, once it has cured for a week. At 30 mm thick it is strong enough to step on when it is bedded flat: dig a shallow hole, lay 2 cm of sand, press the stone in level with the soil and tamp round it. A stone that rocks on a bump can crack, so the bed matters more than the mix.
Seal nothing yet. Paint the pressed leaf with a green outdoor masonry or acrylic paint, keeping off the stone round it, and wipe the high points of the splits with a damp cloth so the grey shows. Once dry, brush two coats of a clear outdoor concrete sealer over everything.
A bagged mortar or sand-cement mix at 1 part cement to 2 or 3 parts sand, with just enough water to pour thickly. Gravel will not follow the veins. For extra strength against frost, lay a square of plastic mesh halfway up while you fill.
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