Best PETG Glue

PETG filament is one of the most popular choices for serious 3D printing enthusiasts, being far more durable than PLA, but more manageable to work with than ABS. 

PETG is often used by professionals for 3D printing products that need to be durable. Things like medical models, or parts used in construction are often printed with PETG filament. In a hobbyist 3D printing studio, PETG may be used for parts with moving pieces, like cog machines or drones. 

01/09/2023 09:45 am GMT

Why Glue PETG?

Printing multiple pieces

Some things are just too large or complex to be printed as a single piece. 3D printed cosplays often require glue to assemble multiple printed parts into one great costume. If you have a small printer you might find files that are too big to print in your machine. So, a solution is to glue several smaller 3D printed pieces together.

Fixing broken parts

One of the biggest reasons you’d use glue on a PETG 3D print is when something breaks. PETG is ideal because it is more durable than other filaments like PLA. Still, even with PETG’s strong composition, sometimes pieces break. You never want to be forced to throw out an entire project when it could be fixed with just a spot of glue. That’s why it’s important to make sure you are selecting the perfect glue for your PETG project.

What Glue Works on PETG?

A variety of glues work on PETG, including super glue, Gorilla glue, polyurethane, silicone glue, epoxy resin, and you can even use a hot glue gun.

a list of glue types that works on petg

When you pick a glue, you’ll want to consider a few things. First, consider how strong and durable the bond needs to be. Decide whether the seam needs to be clean, or if some bulging is okay. 

Also think about flexibility. Some bonds should be strong and hard, whereas others can be a little bit flexible. These factors will all affect which glue best suits your project – though we’ll explain all the intricacies in this article.

How To Glue PETG

To glue PETG, simply prepare all bonding surfaces by sanding and cleaning. Then apply a layer of adhesive to either one or both sides, and press them tightly together. For adhesives that have longer setting times, clamping is helpful. Wait for the adhesive to fully cure before applying any pressure to the bond.

Best PETG Glue

Super Glue / Cyanoacrylate

Best Glue For 3D Prints
Gorilla Super Glue, 20 Gram, Clear, (Pack of 1)
$7.98
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01/09/2023 09:45 am GMT

Super glue is a go-to, reliable adhesive. Most people already have a tube in their toolbox, which makes it a convenient choice. Superglue can be quickly applied to broken parts in a pinch. If you don’t already have a small bottle stashed away, it’s cheap and easy to get your hands on. 

Super glue also works well on PETG pieces. It is a strong adhesive and matches PETG’s durability. It’s sturdy, and the bond will last a long time, even through normal wear and tear. 

Darth Vader PETG print2
Darth Vader sliced in 15 parts and assembled with super glue and melted filament. Source: Reddit

Price

$7.98 for a 20 g bottle of Gorilla Super Glue

Safety

  • Always use super glue in a well ventilated area. 
  • Super glue dries very quickly. Always wear gloves to make sure you don’t super glue your fingers together and protect your skin. 

How to use

  • Prepare all bonding surfaces by sanding and cleaning.
  • Line up the surfaces before you begin. 
  • Apply a thin layer of super glue to each surface. 
  • Press tightly together, and clamp or weigh down if possible.
  • Be careful to press the parts together correctly the first time. They will fuse together almost immediately, so a precise hand is important. 

3D Gloop

3D Gloop! PET Gloop Brushtop Bottle - 120ml | MatterHackers
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3D Gloop! manufactures a line of adhesives specifically formulated for gluing 3D printed parts. They have created a specific product for PET, PETG, and co-polyester filament parts – called PET Gloop.

They even claim PET Gloop is stronger than super glue, epoxy, and even stronger than PETG itself.

Laptop cooling pad multipart print glued with 3D Gloop
Laptop cooling pad multipart print glued with 3D Gloop for PET. Source: Youtube

Price

$24.99 for a 75 ml bottle & $34.99 for a 120 ml bottle of PET Gloop

Safety

Fumes can be a concern, so be sure to wear a respirator or make sure you have plenty of ventilation. It is recommended that you wear latex gloves to protect your skin. Use care to not get any PET Gloop on any plastic work surfaces, especially your 3D printer’s build plate. PET Gloop is very sticky and it will stick and stay forever. 

How to use

  • Prepare all bonding surfaces by sanding and cleaning.
  • Shake the bottle well, especially if it has been sitting for a while. Then let it rest for about a minute to help keep the seal clean.
  • Apply lots of Gloop to both surfaces. 
  • If possible, clamp pieces together or weigh them down. This will create a strong bond. 
  • Give your parts an hour or more for the Gloop to fully cure.
  • If any Gloop oozed out from the seam, it can be removed with a razor blade once the Gloop is fully cured.

Polyurethane

Gorilla Original Waterproof Polyurethane Glue, 8 Ounce Bottle, Brown, (Pack of 1)
$12.48
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01/09/2023 07:01 am GMT

Polyurethane glue is less recognized than common super glue – but it’s just as versatile. 

Standard Original Gorilla Glue is a polyurethane adhesive. The main benefit of polyurethane over regular cyanoacrylate super glue is the extra toughness. If you chose PETG filament for the extra strength, you’ll want a glue that can match that strength. Polyurethane is up for the task. 

Polyurethane is also waterproof, which is especially useful if you’re planning on 3D printing PETG parts for use outdoors.

One of the qualities that gives it that extra strength is that the polyurethane expands when it dries. This is fine on large parts, but isn’t ideal for more delicate pieces. If you plan on gluing something that will see a lot of wear and tear, the extra strength could be worth a slight bulge on the seam.

Price

$12.48 for an 8 oz bottle of Original Gorilla Glue

Safety

Always use polyurethane in a well ventilated area or wear a respirator. Keep away from skin, clothes, and surfaces. Wear gloves to protect the skin.

How-to glue

  • Prepare all bonding surfaces by sanding and cleaning.
  • Damped the surface with a spray bottle of water. 
  • Apply a thin layer of polyurethane glue to one side of your project. Press the other side in for a secure bond. 
  • Wipe away any excess glue with a damp cloth within the first 15 minutes after application. 
  • Clamp for two hours at minimum, and allow a full 24 hours for a full cure.

Silicone

Henkel 908570 2.7 oz Tub Clear Silicone Waterproof Sealant, Single Tube
$6.28 ($2.33 / Fl Oz)
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01/09/2023 06:50 pm GMT

Clear silicone can be used as an adhesive, as well as a sealant. This, in addition to its strength and slight flexibility, make it the perfect adhesive for PETG projects that need to be water tight – whether they are designed to hold water, or keep it out. Silicone creates a resilient bond that doesn’t crack, peel, or shrink, and is able to withstand some impact and harsh temperatures. 

Price

$5.78 for a 2.7 oz tube of Henkel Loctite Clear Silicone Waterproof Sealant

Safety

Always use silicone in a well ventilated area or wear a respirator. Keep away from skin, clothes, and surfaces. Wear gloves to protect the skin.

How-to

  • Prepare all bonding surfaces by sanding and cleaning. The surface should be rough for the best results.
  • Apply to one of the surfaces to be bonded.
  • Press surfaces together.
  • Clamp tightly for 24 hours for a full cure.

Epoxy

Gorilla 2 Part Epoxy
$15.47 ($7.74 / Count)

Sets in 5 Minutes, .85 Ounce Syringe, Clear, (Pack of 2)

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01/09/2023 11:45 am GMT

Epoxy is an effective and versatile choice for PETG bonding. It’s very strong and hard when dry, so there’s no risk of your parts breaking off from each other once the epoxy is set and cured. 

Epoxy isn’t just glue, it can also be used as a plastic filler. Epoxy can fill in small holes, seams, and imperfections on 3D printed parts. It is also great for smoothing surfaces.

PETG connected to caster shells
PETG glued to original caster shells with 2 part epoxy. Source: Reddit

Price

$15.18 for Gorilla 2 Part Epoxy .85 Ounce Syringe Pack of 2 

Safety

Epoxy is toxic and should not be breathed in. Proper ventilation is essential while working, but a good respirator is also a great idea. Gloves should be worn to protect the skin.

How-to

Epoxy can be tricky to use at first. There are two types of chemicals that must be mixed at a specific ratio. First is the epoxy resin itself, then also a hardener that will trigger the chemical reaction that allows the epoxy to set. You need to get the proportions right, and once mixed, it needs to be used within a few minutes.

  • Carefully read the directions that come with your epoxy resin to make sure that your bond is successful. 
  • To use epoxy as an adhesive, simply brush a thin layer onto one bonding surface. Press together.
  • If possible, clamp for at least 30 minutes. Up to 24 hours for the full cure time. 

3D Pen

SCRIB3D Advanced 3D Printing Pen with 20 Feet of Filament, Stencil Book, and Project Guide
$49.99 ($3.55 / oz)
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01/09/2023 10:25 am GMT

3D Pens are a great way to connect pieces together. This method is perfect if consistency is important for your finished product. If you use the same filament for the initial print, and for the 3D pen “glue”, it’ll be practically impossible to tell where one part ends and another begins. They’re literally be made from the same material. 

Used 3d pen to glue parts together
Used 3d pen to glue parts together. Source: Reddit

Price

$39.99 for SCRIB3D Advanced 3D Printing Pen with 20 Feet of Filament

Safety

Be careful not to touch hot filament to avoid burns. Keep away from skin and clothing. 

How-to

  • Prepare all bonding surfaces by sanding and cleaning.
  • Apply a thick layer of hot filament to one surface. 
  • Quickly press the other surface to it. Hold the pieces together until set.

Hot Glue Gun

Gorilla Dual Temp Mini Hot Glue Gun Kit with 30 Hot Glue Sticks
$17.99
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01/09/2023 06:55 am GMT

Hot glue guns are everywhere. While not the strongest bond on this list, hot glue can be a great choice in a pinch. If something breaks or you need a quick hold hot glue is a great choice. As long as the bond doesn’t need to withstand too much pressure, hot glue will be fine.

Gluing a PETG 3D print with a hot glue gun
Testing hot glue gun/melted glue on small PETG strips. Source: Youtube

Price

$17.99 for Gorilla Dual Temp Mini Hot Glue Gun Kit with 30 Hot Glue Sticks 

Safety

The nozzle of a hot glue gun gets very hot, just like the nozzle of a 3D printer. Be careful not to touch the nozzle to avoid burns. Keep hot glue away from skin and clothing. 

How-to

  • Prepare all bonding surfaces by sanding and cleaning.
  • Heat up the hot glue gun. 
  • Apply a thick layer of glue to one bonding surface.
  • Press the other surface to it. 
  • If possible, clamp pieces together until set. 

FAQs

How to glue PETG printed parts together

3D printed pieces made with PETG filament can easily be glued together. Prepare all bonding surfaces by sanding and cleaning. Apply a layer of adhesive to either one or both sides. Press tightly together. For adhesives that have longer setting times, clamping is helpful. Wait for the adhesive to fully cure before applying any pressure to the bond.

What can I use to glue PETG?

Lots of different glues work on PETG. When you pick a glue, you will want to consider a few things. Consider how strong and durable the bond needs to be. Decide whether the seam needs to be clean, or if some bulging is okay. Think about flexibility. Some bonds should be strong and hard, some should be a little bit flexible. With all of this in mind, choose your glue.

Does PETG need adhesive?

PETG needs adhesive to glue multiple pieces together. A 3D maker might need to glue PETG pieces together if they need a large model. Some things are too large or complex to be printed as a single piece. You might also need adhesive to fix broken parts. PETG is a durable filament, so if it breaks, you need durable glue.

Can you glue PLA and PETG together?

You can glue PLA and PETG together. Print out both pieces with the filaments you want to use. Then apply a thin layer of glue to each of the bonding surfaces. Use either cyanoacrylate super glue or polyurethane glue to glue PLA and PETG. Press the pieces together, and for best results clamp them for at least an hour. 

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