Knowing how to glue 3D prints together isn’t quite as simple as reaching for the nearest tube of superglue. PLA, ABS, PETG and nylon may all come out of a 3D printer looking broadly similar, but chemically they are very different plastics. An adhesive that forms an excellent bond on ABS may perform poorly on nylon, while some specialist structural adhesives can bond several different filament types.
Whether you’re assembling a large model printed in sections, repairing a broken component or joining 3D printed parts as part of a functional assembly, choosing the correct adhesive can make a significant difference to the strength and durability of the finished part.
In this guide we’ll explain how to glue 3D prints together, including PLA, ABS, PETG and nylon, the different types of adhesive available and which products are worth considering.
What Is the Best Glue for 3D Printed Parts?
There isn’t one universal best glue for 3D printed parts because the correct adhesive depends on:
- The filament material
- The size of the joint
- How accurately the surfaces fit together
- Whether the component carries a mechanical load
- Whether it will experience vibration or impact
- Whether the joint needs to remain slightly flexible
- The environment in which the finished component will be used
This is particularly important with engineering filaments such as nylon, where choosing an adhesive simply because it says “plastic glue” on the packaging can result in a disappointing bond.
Quick 3D Print Adhesive Comparison Chart
| 3D printed material | Bonding difficulty | Adhesive options worth considering | Important note |
|---|---|---|---|
| PLA | Low–medium | Cyanoacrylate, epoxy | Test first as PLA formulations and additives vary |
| ABS | Low–medium | Cyanoacrylate, structural acrylic/MMA | Plexus MA300/MA310 and Permabond TA4550/TA4610 have documented ABS compatibility |
| PETG | Medium | Specialist structural acrylic | Permabond TA4550 and TA4610 have published PET-G test data |
| Nylon / PA6 / PA12 | Difficult | Specialist nylon structural acrylic | Permabond TA4550 is specifically designed for nylon/polyamide |
| PP / PE filament | Difficult | Polyolefin structural acrylic | Permabond TA4610/TA4611 is specifically designed for low surface energy PP and PE |
| TPU | Application dependent | Flexible adhesive system | Avoid assuming a rigid adhesive will suit a flexible printed component |
The filament itself should always be confirmed before selecting an adhesive. If you’re unsure about the differences between common printing materials, the Prusa Filament Material Guide provides a useful independent comparison of PLA, PETG, ABS, nylon, PP and other 3D printing materials.
How to Glue PLA 3D Prints Together
PLA, or polylactic acid, is one of the most commonly used 3D printing materials, so it’s unsurprising that best glue for PLA and best glue for PLA 3D prints are common searches.
For small decorative components and accurately fitting parts, cyanoacrylate adhesive, commonly known as superglue, can be a convenient starting point.
The important consideration is joint fit.
Thin cyanoacrylates perform best where the two surfaces fit closely together. If your printed components have an uneven interface or a significant gap, simply applying more thin superglue is unlikely to produce the best result.
A higher-viscosity or gel cyanoacrylate can be more forgiving on less accurate assemblies, while a suitable two-part epoxy may be preferable where larger gaps need to be filled.
When deciding how to glue 3D prints together in PLA, also consider whether the printed part itself is strong enough for the application. A very strong adhesive cannot compensate for poor layer adhesion or a component that fractures through the printed layers adjacent to the bonded joint.
Best Adhesive Type for PLA
| Application | Adhesive type |
| Small model or miniature | Cyanoacrylate |
| Tight-fitting PLA components | Low/medium viscosity cyanoacrylate |
| Slightly uneven joint | Gel/high-viscosity cyanoacrylate |
| Larger gaps | Two-part epoxy |
| Structural or load-bearing assembly | Application-specific testing recommended |
Because PLA formulations, blends, pigments and additives vary considerably between filament manufacturers, we recommend carrying out a test bond before using an adhesive for critical PLA assemblies or contacting our team with your application details so we can recommend the correct product.
How to Glue ABS 3D Prints Together
ABS provides more documented structural adhesive options.
If you need to know how to glue 3D prints together where the components are made from ABS, structural methacrylate adhesives can provide considerably more strength and toughness than a general-purpose household glue.
Plexus MA300 for ABS 3D Prints
Plexus MA300 is a two-part methacrylate structural adhesive designed for bonding thermoplastics, metals and composites.
ABS and ABS blends are specifically listed among the suitable thermoplastic substrates by the manufacturer.
MA300 is particularly useful where you’re assembling larger functional ABS components and require:
- High structural strength
- Impact resistance
- Resistance to vibration
- Gap-filling ability
- A non-sagging adhesive
- Rapid strength development
For users without the appropriate dispensing equipment, a Plexus MA300 Starter Pack containing the adhesive, dispensing gun and mixer nozzles is also available.
Plexus MA310 for ABS
Plexus MA310 is another structural methacrylate adhesive with ABS specifically listed as a suitable substrate.
The main advantage of MA310 over MA300 for larger printed assemblies is its longer working time. This gives you more time to apply the adhesive, align multiple printed components and position everything correctly before the adhesive begins developing strength.
Plexus MA300 fixture time 3-6 mins/Plexus MA310 fixture time 15-20 mins.
This can be particularly useful when joining a large model that has been split into several printed sections.
Permabond TA4550 for ABS
Permabond TA4550 can also be considered for ABS.
Although TA4550 was primarily developed as a nylon/polyamide bonder, Permabond’s technical data also reports shear strength of 5–7 N/mm² on ABS.
This makes it particularly interesting when an assembly contains ABS alongside nylon, metal or another compatible engineering material.
How to Glue PETG 3D Prints Together
PETG can be more challenging than ABS, but there are structural adhesives with published PETG performance data.
This is where checking the manufacturer’s technical data becomes particularly important.
Permabond TA4610 for PETG
Permabond TA4610 is a two-part toughened structural acrylic adhesive.
Although primarily developed for difficult low-surface-energy plastics such as polypropylene and polyethylene, Permabond’s technical data also includes PET-G at greater than 5 N/mm² shear strength, with substrate failure reported during testing.
TA4610 also offers up to approximately 1mm controlled gap fill, which can be useful when how to glue 3D prints together involves printed surfaces that aren’t perfectly flat.
Permabond TA4550 for PETG
TA4550 is another particularly interesting option.
Permabond publishes PET-G shear strength of greater than 5 N/mm², again with substrate failure reported under its test conditions.
This gives us considerably stronger technical justification for recommending TA4550 or TA4610 for PETG than simply assuming that a generic “plastic adhesive” will work.
PETG Adhesive Comparison
| Product | PETG specifically tested? | Type | Particularly useful for |
| Permabond TA4550 | Yes | 2-part structural acrylic | Strong structural assemblies and mixed-material bonding |
| Permabond TA4610 | Yes | 2-part structural acrylic | PETG, difficult plastics and joints requiring controlled gap |
| Plexus MA300 | Not specifically listed in current substrate data checked | 2-part MMA | Use on specifically approved thermoplastics such as ABS rather than assuming PETG compatibility |
| Plexus MA310 | Not specifically listed in current substrate data checked | 2-part MMA | Excellent for listed thermoplastics such as ABS, but PETG should be tested before use |
How to Glue Nylon 3D Prints Together
Nylon is where adhesive selection becomes much more important.
If you’re researching how to glue 3D prints together and your components are PA6, PA6.6, PA12 or another nylon/polyamide, a general-purpose plastic adhesive shouldn’t automatically be assumed suitable.
Nylon can be notoriously difficult to bond reliably.
Permabond TA4550 Nylon Adhesive
Permabond TA4550 is the standout option here because it was specifically developed for structural bonding of nylon/polyamide.
Permabond states that TA4550 is designed to bond materials including PA6 and PA12 without primer or additional surface treatment.
Published technical data includes shear strengths of greater than 6 N/mm² for PA6 and PA6.6, with substrate failure reported during testing.
It is also a toughened adhesive, making it useful where the printed assembly will encounter vibration or impact.
This makes TA4550 particularly suitable for functional nylon components, prototypes, housings, brackets and engineering assemblies where the adhesive joint needs to do considerably more than simply hold a decorative model together.
Buy Permabond TA4550 Nylon Adhesive
What About PP or PE 3D Prints?
Polypropylene and polyethylene are low surface energy plastics and are notoriously difficult to bond using conventional adhesives.
If you’re trying to determine how to glue 3D prints together and have confirmed that your filament is PP or PE, Permabond TA4610 is specifically designed for these materials.
Unlike many conventional adhesives, TA4610 can bond untreated polypropylene and polyethylene without a separate primer.
Permabond publishes shear strength figures of greater than 8 N/mm² for polypropylene and greater than 7 N/mm² for polyethylene.
That makes it a much more appropriate choice than experimenting with general-purpose epoxy or standard superglue on these difficult plastics.
Surface Preparation Before Gluing 3D Printed Parts
Even the best glue for 3D printed parts can perform poorly if the surfaces are contaminated.
Before bonding:
- Identify the filament. Don’t assume the material from appearance alone.
- Remove loose material. Trim away support remnants, strings and poorly attached layers.
- Check the joint fit. Place the components together before applying adhesive.
- Clean the surfaces. Remove dust, grease, release agents and contamination using a cleaner compatible with the filament.
- Abrade only where appropriate. Light abrasion can increase available bonding area on some materials, but specialist adhesives such as TA4550 and TA4610 are specifically designed to bond certain plastics without additional surface treatment.
- Keep the adhesive inside its recommended gap. More adhesive does not necessarily mean a stronger joint.
- Hold the assembly securely. Clamp or fixture the components so they cannot move during the initial cure.
- Allow sufficient cure time. Fixture time and full cure are not the same thing.
If the application is structural or safety-critical, always carry out representative testing before moving into full production.
Should You Sand 3D Prints Before Gluing?
Sometimes, but not automatically.
Layer lines can actually provide additional mechanical keying, whereas aggressive sanding may alter the joint geometry or make two accurately printed surfaces fit poorly.
If a printed face is glossy, contaminated or irregular, light preparation may help. However, the correct preparation depends on the filament and adhesive being used.
When using a specialist adhesive, always follow its technical data rather than automatically sanding every surface.
Why Does Glue Fail on 3D Printed Parts?
Understanding how to glue 3D prints together also means understanding why bonded prints sometimes fail.
A failed assembly doesn’t necessarily mean that the adhesive itself wasn’t strong enough.
Common causes include:
| Problem | Possible cause |
| Adhesive peels cleanly from print | Poor adhesion or incorrect adhesive for the polymer |
| Print breaks next to adhesive | Adhesive may be stronger than the printed substrate |
| Layers separate | Print/layer strength rather than adhesive failure |
| Joint remains soft | Incorrect mixing, cure conditions or incompatible adhesive |
| Bond cracks under movement | Adhesive may be too rigid for the application |
| Parts separate under load | Poor joint design, insufficient bond area or unsuitable adhesive |
| Only certain prints fail | Different filament formulation, additives or surface contamination |
One particularly important point with 3D printing is that the adhesive joint can be stronger than the print itself.
This is why simply searching for the strongest possible glue isn’t always the answer.
Best Adhesive for 3D Prints: Product Comparison
If you’re still deciding how to glue 3D prints together, this table provides a useful starting point.
| Adhesive | Chemistry | Filaments/materials supported by manufacturer data relevant to this guide | Best suited to |
| Permabond TA4550 | Structural acrylic | PA6, PA6.6, ABS, PET, PET-G and others | Nylon and structural engineering-plastic assemblies |
| Permabond TA4610 | Structural acrylic | PP, PE, HDPE, ABS, PA6, PET-G and others | Difficult plastics, PETG and polyolefins |
| Plexus MA300 | Methacrylate | ABS/ABS blends plus other listed thermoplastics | Fast structural ABS assemblies |
| Plexus MA310 | Methacrylate | ABS/ABS blends plus other listed thermoplastics | Larger ABS assemblies requiring more positioning time |
| Cyanoacrylate | CA | Grade dependent | Small close-fitting PLA/model assemblies |
| Epoxy | Epoxy | Grade dependent | Larger gaps and general rigid assemblies where compatibility is confirmed |
Which Adhesive Should You Choose?
For small PLA models and decorative components, a suitable cyanoacrylate is often the simplest starting point.
For ABS, Plexus MA300 or MA310 can provide structural strength where the finished component needs to withstand significantly greater loads, impact or vibration.
For PETG, Permabond TA4550 and TA4610 are particularly interesting because Permabond publishes specific PET-G performance data rather than leaving compatibility to guesswork.
For nylon, Permabond TA4550 would be our first product to consider because it has been specifically developed for structural bonding of nylon/polyamide.
And for PP or PE prints, TA4610 provides a specialist option designed specifically to tackle these difficult low surface energy plastics.
Ultimately, learning how to glue 3D prints together starts with identifying the filament rather than choosing the adhesive first.
The best glue for PLA 3D prints won’t necessarily be the best product for ABS, PETG or nylon, and the strongest adhesive on paper isn’t automatically the best choice for every printed component.
For critical applications, always test the adhesive with the exact filament, print settings and joint design being used. 3D printing filaments can contain pigments, fibres and other additives that influence adhesion, while the strength of the printed layers themselves can become the limiting factor.
If you’re unsure which adhesive is suitable for your 3D printed component, contact us with the filament type, approximate bond area, operating conditions and what the finished component will be used for, and we’ll help you narrow down the most suitable option.