Best PETG glue: which glue to choose to assemble and repair your 3D prints?
The PETG has become one of the most popular filaments in the world of 3D printing. More resistant to shocks than PLA, relatively flexible and suitable for many functional parts, it is used by makers and modelers as well as by professionals.
But one question comes up regularly after printing: what is the best PETG glue?
Assembling two large parts, repairing a broken print, attaching the different parts of a model or building a prototype requires a glue capable of providing precision, resistance and ease of use.
At Super Glue Colle21, we have been developing for more than 13 years cyanoacrylate glues and professional adhesives for many applications, including 3D printing. Our range of more than 140 products allows you to choose different viscosities and formulations depending on the material and the type of assembly sought, always with excellent value for money.
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What is PETG?
PETG, or glycolized polyethylene terephthalate, is a very popular thermoplastic in FDM 3D printing.
It often represents an interesting compromise between ease of printing and mechanical performance.
PETG is particularly appreciated for:
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its resistance to shocks;
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its good mechanical strength;
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its slight flexibility;
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its good stability;
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its durability;
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its ability to produce functional parts.
It is found in the manufacture of:
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prototypes;
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mechanical parts;
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accessories ;
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housings;
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supports;
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RC parts;
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decorative objects;
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models;
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3D printed equipment.
When the size of a part exceeds the volume available on the printer, it becomes necessary to print it in several elements. It is then that the choice of best glue for PETG takes on all its importance.
What is the best PETG glue?
For many assemblies, a professional quality cyanoacrylate glue provides a practical solution for PETG.
But not all repairs are the same.
A perfectly fitted joint does not require the same viscosity as an assembly with a slight gap. A small figurine also does not present the same constraints as a large functional piece.
This is why Super Glue Colle21 offers several formulations.
The goal is not to pretend that one glue is perfect for everything, but to be able to choose the right glue for the right application.
Why use cyanoacrylate glue for PETG?
Cyanoacrylate has several advantages for 3D printing jobs:
✔ rapid setting;
✔ precise application;
✔ small quantity required;
✔ several viscosities available;
✔ simplicity of use;
✔ suitable for small details as well as larger assemblies depending on the formulation.
To obtain the best result, however, surfaces must be clean, dry and properly prepared.
Super Glue Colle21 FAST: for very precise PETG assemblies
When two PETG parts fit perfectly, a very fluid glue can be beneficial.
Super Glue Colle21 FAST has a low viscosity which allows it to penetrate small gaps.
It is particularly suitable for:
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small parts;
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details ;
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miniatures;
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models;
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very tight assemblies;
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fine repairs.
Its fluidity allows for rapid and precise application.
Super Glue Colle21 Classic: the versatile solution
For daily use, the Super Glue Colle21 Classic offers excellent versatility.
It can be used for many operations:
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assembly of printed parts;
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repair ;
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prototyping;
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model making;
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decorative objects;
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small technical parts.
This is an interesting solution for users who regularly print in 3D and are looking for a versatile glue.
Super Glue Colle21 DENSE: more control, less dripping
On some PETG prints, very liquid glue can be difficult to control.
The Super Glue Colle21 DENSE has a superior viscosity which allows the glue to be deposited precisely on the desired area.
It is particularly interesting for:
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vertical pieces;
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large prints;
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visible assemblies;
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objects with slight play;
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the prototypes.
The glue stays more where it is applied, making assembly much easier.
Super Glue Colle21 FREEZE : for difficult assemblies
When surfaces do not fit perfectly, a GEL formulation can make the job easier.
The Super Glue Colle21 FREEZE allows a particularly controlled application.
It is particularly suitable for:
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large printed pieces;
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vertical surfaces;
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localized repairs;
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assemblies with small spaces;
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difficult to access areas.
Its consistency greatly limits dripping.
Super Glue Colle21 FLEX: for certain parts subject to constraints
PETG is often chosen because it has more flexibility than PLA.
Certain printed parts may therefore undergo:
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vibrations;
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small shocks;
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flexions;
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repeated constraints.
For some of these applications, Super Glue Colle21 FLEX can constitute an interesting alternative when a less rigid formulation is sought.
The choice must always be made according to the real constraints to which the part will be subjected.
How to properly glue two PETG parts?
The quality of the glue is important, but so is the preparation.
1. Perform a blank edit
Before applying the glue, position the two elements.
Check that:
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the surfaces match;
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the parts are correctly aligned;
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no printing support hinders assembly.
2. Clean surfaces
Carefully remove:
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dust;
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fat ;
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printing residue;
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particles from sanding.
Surfaces must be clean and dry.
3. Lightly sand if necessary
A particularly smooth surface can sometimes benefit from light sanding to improve the contact area.
4. Use little glue
One of the most common mistakes is applying too much cyanoacrylate.
More glue does not necessarily mean stronger bonding.
A thin, properly distributed layer is generally preferable.
5. Precisely position the parts
Align items correctly before initial setting.
6. Let it polymerize
Even if the initial setting is rapid, avoid immediately subjecting the assembly to significant stress.
How to repair a broken PETG 3D print?
A broken PETG part is not necessarily good to throw away.
If both parts can be repositioned correctly, a repair may be considered.
Start by analyzing the breakout.
If the surfaces fit perfectly, a fluid formulation like FAST can be interesting.
If the break is irregular or has a slight gap, a formulation DENSE or FREEZE can provide more control.
For parts subject to high mechanical stress, it is also necessary to determine whether simple bonding is sufficient or whether the design of the part needs to be reinforced.
Paste large PETG prints
Large 3D printing projects often need to be divided into several sections.
This is particularly the case for:
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prototypes;
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large models;
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cosplay;
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fairings;
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decorations;
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housings;
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functional parts.
On a large surface, control of the application becomes particularly important.
A thicker glue such as Colle21 DENSE or GEL can facilitate positioning before assembly.
PETG, PLA and ABS: should we use the same glue?
PLA, PETG and ABS all belong to the thermoplastic family, but their surface characteristics and mechanical properties are different.
It is precisely for this reason that it is preferable not to think only in terms of “universal Super Glue”.
At Super Glue Colle21, we offer different viscosities, formulations and complementary products in order to be able to adapt the solution to the material and the project.
For any plastic or filament whose exact composition is unknown, a preliminary test on an invisible area remains recommended.
Over 140 products to meet all bonding needs
3D printing is only part of the universe Super Glue Colle21.
Our catalog includes more than 140 bonding products and solutions, in particular:
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cyanoacrylate glues;
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FAST;
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DENSE;
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FREEZE ;
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FLEX;
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BLACK;
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SLOW DRY;
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activators;
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primers;
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debond;
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UV LED resins;
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vinyl glues;
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spray adhesives;
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precision accessories.
This range meets the needs of model making, 3D printing, DIY and many professional applications.
Our philosophy remains simple: offer the solution adapted to the project with excellent value for money.
Super Glue Colle21 : manufacturer of cyanoacrylate glues and producer of professional adhesives
Super Glue Colle21 is a manufacturer of cyanoacrylate glues and producer of professional adhesives offering solutions for individuals, makers, modelers, craftsmen, distributors and professionals.
Our experience includes:
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3D printing;
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model making;
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figurines;
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CR;
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DIY ;
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drink ;
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metal ;
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glass ;
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ceramics;
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resin;
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aquascaping;
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fishing ;
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professional applications.
With more than 140 references, our objective is to allow each user to choose a formulation that really corresponds to their needs rather than offering a single glue for all applications.
⭐⭐⭐⭐⭐ Over 500 Google reviews
The trust of our users is one of the best recognitions of our work.
⭐⭐⭐⭐⭐ 500+ Google reviews
Individuals, 3D printing enthusiasts, modelers, makers, craftsmen and professionals use the products every day Super Glue Colle21 for their bonding and repair projects.
FAQ – Best PETG Glue
What is the best glue for PETG?
A quality cyanoacrylate glue can be suitable for many PETG assemblies. The choice of viscosity depends above all on the fit of the parts, the surface to be glued and the mechanical constraints.
What Colle21 choose for PETG?
For a perfectly adjusted assembly, FAST allows for very smooth application. For more control, DENSE or GEL may be preferable. The version Classic is a versatile solution.
Can you repair a broken PETG print?
Yes, in many cases, provided the surfaces can be properly repositioned and prepared.
Should you sand PETG before gluing it?
This is not always necessary, but light sanding can be helpful on some very smooth surfaces.
What glue should I use for a large PETG print?
A thicker glue like DENSE or GEL can facilitate application on large surfaces and limit dripping.
Can we use an activator?
An activator may be used in certain applications to accelerate the setting of the cyanoacrylate. It is important to follow the recommendations for use of the product and carry out a preliminary test.
Where to buy Super Glue Colle21 ?
You can find our range directly on Colle21.com as well as on our Super Glue official Amazon store Colle21.
Conclusion: what is ultimately the best PETG glue?
The best PETG glue is the one that corresponds precisely to the type of assembly you want to make.
FAST for very precise junctions.
Classic for versatile use.
DENSE to further control the application.
FREEZE for difficult assemblies or those with a slight gap.
FLEX for certain applications requiring more flexibility.
With a range of more than 140 products, Super Glue Colle21 supports 3D printing enthusiasts, makers, modelers, craftsmen and professionals with efficient solutions and excellent value for money.
⭐⭐⭐⭐⭐ 500+ Google reviews
🌐 Discover the entire Super Glue range Colle21 on Colle21.com
📦 Also find our products on the store Amazon official Super Glue Colle21.
