3D printing is a craft. We make useful, innovative things out of nothing but ingenuity and a little bit of filament. But a little glue for PLA 3D prints to hold things together never hurt anyone.
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Great For ABS
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Best Glue For 3D Prints Overall
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Ideal For TPU and Nylon
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4.4
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4.7
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4.3
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$9.99 ($1.25 / Fl Oz)
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$7.98 ($11.24 / Ounce)
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N/A
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Quick Overview
- Gorilla Super Glue: Best for most 3D printed parts, and best for PLA overall
- Pronto 100% Pure Acetone: Best For ABS
- Gorilla 2 Part Epoxy: Works with PLA, ABS and PETG
- SCRIB3D Advanced 3D Printing Pen: Best when using the same filament
- Loctite 406 super glue: Best for TPU and Nylon
Best Glues for 3D Printing
1. Super Glue – Best Overall, and Best For PLA
Pros
Strong and sturdy.
Easy to use and widely accessible.
Quick drying.
Cons
May not work well on some TPU and Nylon projects.
Hard and rigid when dry.
The technical name for super glue is Cyanoacrylate. Super glue is the best glue for most projects. It is easy to use, and widely accessible. If you don’t already have a bottle in your makerspace, super glue is available on Amazon and at most supply stores for cheap.
Super glue is a perfect glue for 3D prints because it is strong and stays sturdy over time. You can rely on superglue to hold your pieces together even through use and wear and tear.
Super glue is best glue for PLA 3D prints overall. It’s easy to use, is quick setting, and creates a sturdy bond. Acetone, epoxy, hot glue, and 3D pens can also be used as an adhesive for PLA, but I recommend super glue over them.
If you are careful with your application, you can get very clean seams. You only need a thin layer of super glue for it to be effective, so there is no need to use so much glue it bulges over the side of your seams.
Super glue is a perfect choice for PLA and ABS plastic filaments. However super glue may not work well on some TPU and Nylon projects because it is hard and rigid when dry. If you want to super glue a flexible filament make sure you choose a flexible drying super glue.
Super glue is quick drying. Your parts will fix together quickly, so line your pieces up before you apply a layer of glue. Be careful to press the parts together correctly the first time so that you don’t have to start over because they’re glued in the wrong place. Always wear gloves – you don’t want to super glue your fingers together!
Gorilla Glue is the gold standard in super glue. It dries fully in only 10 seconds, holds tight even under impact, and has an anti-clog cap so that you can buy a bottle once and use it again and again for 3D printing projects. The formula is thin enough to use on small details but thick enough that it will stay in place without dripping. Gorilla Super Glue is the ideal glue for most 3D printed parts.
2. Acetone
Pros
Effective adhesive for PLA and ABS.
Extremely sturdy hold.
Great for smoothing.
Cons
Not suitable for PETG, TPU, or Nylon filaments.
Flammable.
Acetone is an unexpected, but effective adhesive for 3D printing. Acetone works on PLA and ABS, but isn’t a good choice for PETG or TPU or Nylon.
Acetone works by “melting” the surface of the parts- dissolving a layer of filaments. Once the plastic is soft, you can stick them together, and when they reharden together they will bind like one piece.
This method gives an extremely sturdy hold. The two pieces of plastic fuse into one and won’t move anywhere. It is like they were printed as one piece all along.
Another advantage of acetone is that the seam between the two parts will be very clean. It’s possible with two matching pieces to have a seam that is completely invisible. If a hidden seam is important for your project, acetone is the best choice.
Don’t use acetone on thin pieces. Avoid using too much or letting it soak for too long, or it may dissolve too much plastic and you’ll end up with a compromised part.
Acetone is flammable- keep it away from open flame or anything that might spark. Acetone is also great for smoothing.
How to Glue 3D prints with acetone
- Use a paintbrush to apply a thin layer of acetone to both surfaces.
- The plastic will start to get tacky right away, but it takes a few minutes for the full “melting” effect.
- Press the pieces together and set them aside for a few hours to dry. For additional security, you can weigh the parts down or clamp them together while they dry.
- Once your pieces are hardened, they will be inseparable.
You’ll want to choose a bottle of acetone that is 100% concentrated. This one comes in three different sizes so that you can buy the right amount for your needs.
3. Epoxy
Overview
- Check latest price here: Gorilla 2 Part Epoxy
Pros
Dries very fast.
Can fill small holes, seams, or imperfections on prints.
Cons
Emits toxic fumes which require proper ventilation and a good mask.
Epoxy bonds well to PLA plastic and ABS plastic. Epoxy is hard once dry, which makes it a good glue and filler for 3D prints. It can also be used with PETG filament. Epoxy will bond well to TPU filament, but should be avoided if you want to keep your finished part flexible after the epoxy dries.
Epoxy is a very effective 3D printing glue. It dries very hard so your parts will not break from each other once the epoxy sets. Epoxy is special because it’s not only glue, it can also be used to fill in small holes, seams, or imperfections on your 3D printed models. It can also smooth the surface of your prints.
Epoxy is trickier to use than some other adhesives. It is toxic to breathe in, so proper ventilation and a good mask are necessary while working. You also have to mix two types of chemicals- the epoxy resin and a hardener- at a specific ratio. Then the mixture has to be used within a few minutes.
How to Glue 3D Prints with Epoxy
- Make sure your workshop is well ventilated. Wear a mask and gloves.
- Follow the directions that come with your epoxy. You will normally be instructed to mix the contents of two tubes and stir them well.
- Apply a thin layer to the surfaces
- Press the pieces together. Clamp or weigh them for 24 hours to allow the epoxy to cure
Gorilla Epoxy sets clear in five minutes. It comes in an easy-to-dispense syringe to ensure you get an equal ratio of epoxy resin and hardener.
Sets in 5 Minutes, .85 Ounce Syringe, Clear, (Pack of 2)
4. 3D Pens for Gluing PLA
Overview
- Top pick: SCRIB3D Advanced 3D Printing Pen
Pros
Seamless connection for two 3D printed parts.
Fills any gaps in a printed part.
Cons
Not very strong.
3D pens are an excellent way to connect two 3D printed parts. As long as you use the same filament, the finished product will look like it was printed in one piece because it is all the same material. 3D pens can also fill in any gaps in a printed part.
Be sure to use a thick layer of filament to get a sturdy bond between pieces.
The SCRIB3D Advanced 3D Printing Pen is a less expensive option for a 3D pen if you are purchasing a new one.
Be sure to check out our guide on the best 3D pens to select one that will suit all of your needs.
Great for pros seeking precision with speed/temp controls, ergonomic design & large LCD.
Smooth, seamless 3D pen experience.
How To Glue 3D Printed Parts
How To Glue PLA & ABS Filaments
PLA and ABS plastic are the easiest filaments to glue, and work with most adhesives. With just a little bit of simple prep, you will have parts ready to fuse together.
- Always wear gloves. Some of these adhesives are sticky enough to glue your fingers together, so it is important to take precautions.
- Sand the parts to be glued with fine-grit sandpaper. Sanding gets rid of bumps that might prevent the whole surface from attaching. Sanding also creates texture for the adhesive to cling to.
- Clean the whole surface with alcohol. You don’t want any dust left over from your sanding or your glue might not be able to stick to the actual surface.
- Once you are all prepped, follow the directions for your chosen adhesive.
How To Glue PETG Filament
PETG is a polyester filament. It has low surface energy, which means adhesives will stay on the outside of the material rather than soaking in to bond securely. That makes it trickier to glue than PLA or ABS effectively, but it can still be glued using a few different methods.
- Use a 3D pen with PETG filament to “weld” the two parts together. Since the pen is using the same filament, it works as an excellent bonding material.
- Super glue will also work on PETG, but the bond may not be as strong.
How To Glue TPU and Nylon Filaments
TPU and nylon filaments are flexible after printing, especially TPU. You’ve probably printed with TPU for its flexible traits, so avoid hard-drying glues that will restrain your part. There are several flexible adhesive options for gluing TPU and nylon.
- Choose a super glue specifically formulated to be flexible. A product like Loctite 406 super glue will work well on most surfaces.
- Hot glue has a lot more give when it dries than some other adhesives. It can be a convenient choice if you already have a hot glue gun in your studio.
- If you don’t mind a rigid seam, normal super glue will adhere well to TPU and nylon.
Why Glue 3D Printed Parts?
- Not large enough build volume: To make a finished product bigger than your printer’s maximum print size capacity, you will need to print it in several parts and glue them together into one large piece.
- Assembling multiple 3D printed parts together: For example, cosplayers 3D print everything from large plates of armor, down to the smallest embellishments, and then glue them all together to wear to conventions. They sometimes spend months printing hundreds or even thousands of separate parts, of all different sizes.
How To Pick The Right Glue For Your Next 3D Printing Project
How sturdy does it need to be?
Some adhesives hold up better than others, so consider what you’ll use your finished piece for. If it is a decorative vase that will only ever sit on a shelf, you’ll be fine with a soft hold.
However, if you are printing a tool to use professionally or something that needs to sustain wear-and-tear, you’ll need a sturdier glue.
Aesthetics
Different kinds of adhesives leave different-looking seams. If you want the seam to be totally invisible, like the two parts were printed as one, you will need a thin adhesive that won’t bubble.
If that’s not a priority for you, or if you’re working with a seam that will eventually be hidden, you might choose a glue that blobs a little as it dries.
Flexibility
When you’re printing with a hard filament like PLA, you want glue that holds a rigid seam. There may also be times when you need to glue on a flexible filament, and you will want to make sure that the adhesive you are using will bend with your part.
Related Posts:
- The Complete PETG Filament 3D Printing Guide
- Best PETG Glue
- Best Glues For Resin 3D Prints & Resin Models and Miniatures
- PLA vs PETG: Which is the Best Filament for 3D Printing?
- Cool Art Projects Using 3D Pens (With Video Guides!)
