◆ Concrete
Halloween tombstone mold
Two carved R I P tombstones for a Halloween graveyard, cast in concrete straight in a printed tray.
◆ Concrete
Two carved R I P tombstones for a Halloween graveyard, cast in concrete straight in a printed tray.
A printed tray for two round-topped tombstones, each 90 x 130 mm and 22 mm thick, with a carved border, a cross and R I P cut into a weathered face. Heavy enough to stand on a shelf, a porch step or a mantel, or push the foot into a flower bed for a small front-yard graveyard.
Made with our tray mold generator in its rigid tray mode: print the tray, wipe in release, and pour concrete, Jesmonite or plaster straight in. The letters and the cross are cut with sloped sides, so the stone lifts out of the rigid tray with the lettering crisp.
Dry-brush them grey and green for moss, or leave the concrete raw. The zip carries the tray exactly as the tool exported it, one tombstone on its own as an STL, the master uploaded to the tool, and a print and pour sheet with the volume of each cavity.
Shown as a 3D render of the printed tray with concrete tombstones 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.
Print details
| Cast material | Concrete |
|---|---|
| Printed parts | 1 |
| Size (W x D x H) | 206 x 147 x 30 mm |
| Print bed needed | 207 x 147 mm, 30 mm tall |
| Filament | ~195 g |
| Layer height | 0.2 mm |
| Infill | 15% |
| Supports | Not needed |
| Download | ZIP: printed tray (STL) + one tombstone (STL) + tool master (STL) + print and pour sheet |
| Added | 2026-09-25 |
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, after a week of curing and two coats of a clear outdoor concrete sealer. Unsealed concrete takes up water and can flake in a frost. Plaster tombstones are indoor only: they soften in the rain.
Paint the whole stone a mid grey, let it dry, then wipe a black wash over the face and rub it off the flat with a rag. The wash stays in the letters and the border. A light drybrush of white on the edges makes it look old.
Use a fine mix with no gravel, pour it a little wetter than usual, and vibrate the tray well: the letters are the deepest part of the cavity, where air collects. A sander held against the side of the tray for a minute works well.
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