Material guide
Gluing PETG
A tough, slightly flexible printing filament and sheet material with better heat and moisture resistance than PLA.
Also called 3D printed PETG, copolyester, PET-G.
How PETG behaves when you bond it
PETG has a slightly waxy surface that benefits from abrasion and a solvent wipe before bonding. It is more flexible than PLA, so a rigid adhesive on a large PETG part can crack at the bond edge as the part flexes.
PETG is a glycol-modified polyester used in sheet and 3D prints. It is tougher and more flexible than PLA, but smooth printed skins, release contamination and local bending can drive peel at a rigid joint edge.
Material properties
- Surface energy
- Medium
- Porosity
- Non-porous
- Rigidity
- Semi-rigid
- Maximum service temperature
- 70C
- Normally needs abrading
- Yes
- Normally needs a primer
- No
- Solvent sensitive
- Yes. Solvent-based adhesives can craze or dissolve the surface.
- Requires surface treatment
- (Permabond TA4630 reports PET-G lap-shear performance without a separate primer in the stated product process; not a universal primer-free claim.) Manufacturer verified
Surface preparation
Wash and dry, remove weak strings or glossy first-layer skin and lightly abrade to an even key where appearance permits. Wipe debris with isopropanol after testing the grade. Use a toughened adhesive and validate layer-to-layer failure because the print may break before the adhesive releases.
Which adhesives work on PETG
Excellent
Structural acrylic
Structural acrylic is rated excellent for this material as an application-level assessment, not as a blanket manufacturer claim. The prepared surface must be sound and consistently keyed where the finish permits. Suitability still depends on the other substrate, joint design and service environment.
Abrade the surface first.
Good
Two-part epoxy
Two-part epoxy is rated good for this material as an application-level assessment, not as a blanket manufacturer claim. The prepared surface must be sound and consistently keyed where the finish permits. Suitability still depends on the other substrate, joint design and service environment.
Abrade the surface first.
Conditional
Cyanoacrylate
Cyanoacrylate is rated conditional for this material as an application-level assessment, not as a blanket manufacturer claim. The prepared surface must be sound and consistently keyed where the finish permits. Use only after a product-specific test on the actual grade and joint.
Abrade the surface first.
Bonding PETG to something else
PETG to Glass
PETG to Glazed ceramic
PETG to MDF
PETG to Painted metal
PETG to Plywood
PETG to Aluminium
PETG to Mild steel
PETG to PETG
PETG to Stainless steel
Last reviewed 8 October 2026.