Repair guide
How to glue a PETG 3D-printed decoration to a ceramic plant pot
PETG bonds reasonably well once abraded, and glazed ceramic bonds badly until it is. Two-part epoxy handles both and copes with the gap between a flat print and a curved pot.
The short answer
Abrade the back of the PETG print and the glaze where it will sit, then bond with a gel two-part epoxy. PETG is one of the easier print materials to glue, so most of the work is on the ceramic side: an untouched glaze gives an adhesive nothing to hold. If the pot is used outdoors, keep the joint out of standing water and expect to repeat it eventually.
- Difficulty
- Moderate
- Time needed
- 20 minutes work, 24 hours cure
- What you need
- Gel two-part epoxy, 120 and 180 grit abrasive, isopropyl alcohol, masking tape, pencil
PETG prints have a smooth, slightly waxy finish from the nozzle and a layered surface that actually helps once it is abraded, because the ridges give the adhesive something to key into. A quick pass with 180 grit is all it needs. What PETG does not like is heat: it softens well below the temperature a dark pot can reach on a sunny windowsill, so do not clamp it near a heat source while curing.
The glaze is the usual story. Abrade it matt inside the footprint and the epoxy has a mechanical grip; leave it glossy and it does not.
Curvature is worth thinking about before you mix anything. A flat print on a round pot touches along one line. Sanding a shallow curve into the back of the print, or printing it curved in the first place, multiplies the bonded area and the strength with it. Where that is not practical, a gel epoxy will bridge a millimetre or two without slumping.
Step by step
- Dry fit the print and pencil round it on the pot.
- Abrade the glaze inside the line with 120 grit until it is matt all over.
- Abrade the back of the print with 180 grit and, if the pot is strongly curved, sand a shallow hollow to match.
- Wipe both faces with isopropyl alcohol and let it dry off.
- Mix a gel two-part epoxy to the ratio on the pack.
- Apply it to the print, a little thicker in the middle if there is a gap to fill.
- Press it onto the pot, hold for a minute, then tape it so it cannot slide.
- Leave 24 hours out of direct sun before removing the tape.
What to avoid
Do not use hot melt glue. It will hold for a week indoors and let go the first warm day.
Do not skip abrading the glaze. It is the single thing that decides whether this works.
Do not cure the joint on a sunny windowsill. PETG softens with surprisingly little heat and the print can distort while it is held under tape.
If the pot holds a plant that gets watered, keep the bonded area above the waterline and accept that a continuously damp joint will not last indefinitely. Wear gloves when handling uncured epoxy.
The full bonding guide
Everything about gluing PETG to Glazed ceramic
Last reviewed 13 September 2026.