Almost everyone has built lego constructions at some point in their lives. Some do so in childhood, while others don’t lose their passion for the little plastic bricks and keep constructing in adult life.
One of the main advantages of lego bricks is that you can disassemble them very easily whenever you want. But sometimes, that quick and super easy dismantling can be a drawback to building sturdy buildings.
The solution to building a stronger construction with legos is to use adequate glue when joining the bricks together. By adequate, we mean a glue that will make a strong bond, dries clear, and isn’t toxic.
We went on a hunt for the best glue for legos, and we picked 9 such adhesives and reviewed them in this article. We also included an informative section in the article, where you can learn about the kinds of glue to look for as well as how to glue the lego parts together.
Last update on 2024-04-25 / Affiliate links / Images from Amazon Product Advertising API
- Best Glue For Legos – 9 Reviews
- Gorilla Super Glue Gel
- Faller F170492 Expert Plastic Adhesive
- Bob Smith Industries BSI-157H Maxi Cure/Insta-Set Combo Pack
- Loctite Super Glue Gel Control
- Crafters Pick NOM492220 The Ultimate
- Professional Grade Cyanoacrylate (CA) Glue by Glue Masters
- Bob Smith Industries BSI-109 Insta-Cure Gap Filling
- Rhino Glue Gel, Heavy Duty
- Le-Glue – Temporary Glue for Lego
- What To Look For When Choosing Glue For Legos
- How To Glue Lego Blocks
- Safety Tips
- Frequently Asked Questions
- Conclusion
Best Glue For Legos – 9 Reviews
Our Pick
Gorilla Super Glue Gel
Sometimes the simplest products offer the best solution to our problem. We believe that this is such a case since this gorilla glue gel does wonders on lego bricks!
It offers by far the quickest and easiest application but a strong bond as well. For most people, this is the best glue for legos by a mile.
It’s almost always available, cheap, and super easy to apply. The thicker viscosity of this glue is great for application on legos. The liquid super glues aren’t the most practical for legos since they tend to spill and set quickly, leaving you with a mess.
The gel formula used in this gorilla glue provides a much more precise application that is mess-free.
This glue dries clear and leaves no ugly colored residue behind. If there is any excess glue left behind, it can be easily cleaned with a 100% acetone that we recommend using on this kind of project. You can check this one on Amazon, it works really well on legos!
The bonds will be super strong with this glue, much sturdier than with cheaper super glues. This glue also sets very quickly, in only 10 to 45 seconds! It won’t leave you waiting for dozens of minutes, wasting your time.
If you want to make sure that your lego construction lasts for a long time and looks great, go for this gorilla gel super glue! It’s really great and easy to use for people of all ages no matter the amount of experience!
Faller F170492 Expert Plastic Adhesive
If you need a super precise and reliable glue for the most delicate parts, go for this expert Faller adhesive. This German glue is a superb adhesive for legos!
We like the design of the nozzle. It’s very thin and made of metal. It will provide you with a very accurate application. That means it comes out of the nozzle in small drops and amounts.
It takes a little more to set than your standard super glue but makes a very solid bond. You will have a bit more time to align everything just the way you want it. If you need a super-fast setting time, you can always use an accelerator.
This one, in particular, works great with this glue and can be bought on Amazon here. With these two in combination, you’ll bond anything in 5 seconds! For real!
It works quite well without an accelerator as well, and if you don’t mind waiting for some time, it isn’t that big of a deal.
This high-grade glue dries clear as well. It will make the bonds really clean when you consider the precise application as well. Definitely no mess with this neat little adhesive.
This is one of the best adhesives for legos that we could find. If you want an extra precise and clean experience, this is the way to go.
Bob Smith Industries BSI-157H Maxi Cure/Insta-Set Combo Pack
We mentioned the lightning-fast curring time of the accelerator and cyanoacrylate glue in the review above. This set provides you with just that, the fastest possible setting and curing time, and the strongest bond.
This combo is the epitome of convenience. Apply the super glue to one part, spray the activator on the other, and within 10 seconds, the parts will become inseparable!
The activator or accelerator works its magic here. It speeds up the curing time of cyanoacrylate adhesives or super glues tremendously. This is a great time saver that will make you do more for less time.
Apart from the almost instant adhesion, this set provides some serious bonds. The glue has great tensile strength and will hold the legos together for a long time!
The CA glue is extra thick. It’s ideal for use on legos because of the easy application with no spillage. You will also have enough time to align everything before applying the accelerator because of the thickness.
The composite surface will remain clear after the adhesive dries. The bonds will be clean and look great.
This is a dream combo for gluing legos! You will reduce your waiting time significantly and will have a much more enjoyable experience bonding the parts. It’s really fun to work with too! It’s like watching the magic happen as you spray the activator. Try it out and see for yourself!
Loctite Super Glue Gel Control
This is another great super glue gel option for gluing legos! 
The thickness of the gel is just about right for application on legos. It won’t spill or drip too fast or too much.
Setting time is really fast, no more than 30 seconds! The bonds are solid and last long. It doesn’t leave any ugly residue as it dries clear. Great for clean bonds.
The glue is also very easy to use. The buttons on the sides squeeze out just the right amount of glue you need. This is not only great for economical reasons but precise application as well.
And speaking of economics, this is the most cost-friendly option for gluing legos on our list. You’ll achieve optimal results without spending a fortune. And no one wants to overspend on glue, that’s for sure!
Overall, this is a very solid, beginner-friendly option for bonding legos. It’s super easy to apply and is very reasonably priced. You really can’t go wrong with it.
Crafters Pick NOM492220 The Ultimate
This non-toxic, US-made glue is a great choice for gluing legos. Especially if the construction comes in contact with children since this glue is made from non-toxic materials.
This glue has a pretty fast setting and curing time. It holds a bond really well since the strength is very high. It dries clear and leaves no colored residue.
This glue bonds a lot of other materials as well, such as aluminum, glass, paper, and more. If you’re having some other DIY projects, this glue will come in handy.
The price of this glue is on a higher side. And rightly so, it’s one of the non-toxic glues that is very versatile and has great structural strength.
It’s a great choice for gluing lego constructions that kids will play with since the glue is water-based.
Professional Grade Cyanoacrylate (CA) Glue by Glue Masters
If you need a professional-grade adhesive that will make long-lasting bonds on your lego bricks, go for this CA glue from Glue Masters.
It’s an adhesive that professionals use because of its great tensile strength. The bonded lego pieces will be inseparable after drying.
The thickness of this glue is great. It will allow you to precisely apply the glue to the parts you need to bond. If you prefer a really thick glue, go for a thick viscosity option, and if you prefer a glue that is more in the middle, take a medium viscosity option.
The thick viscosity glue will set in around 60 seconds, while you can expect the medium viscosity model to settle a bit faster.
The bottle of this glue is designed excellently. It will prevent the glue in the bottle from drying out by keeping a tight seal as well as stopping any spillage.
If you prefer a super-fast setting time, consider using an accelerator, as we mentioned in the review above. You can get one on Amazon here. It will work perfectly with this high-grade glue.
This glue is an excellent choice for bonding legos. It has serious tensile strength that will make your bonds durable and permanent.
Bob Smith Industries BSI-109 Insta-Cure Gap Filling
Need an extra-fast cure for the most efficient work? This Bob Smith Industries glue is the right choice for that.
It cures incredibly fast in only 5-15 seconds! It will make you glue the lego bricks in no time, finishing your project a lot faster while not sacrificing the strength of your structure.
It comes in a large 8-ounce bottle that will get you more glue for less money. It’s a great purchase if you have a large lego construction or if you use a lot of super glue generally. You will be supplied for months, and the quality packaging will ensure that no glue is wasted.
We found that this glue works on all kinds of materials, but it specifically works great on plastic. That’s why it’s an excellent choice for gluing legos.
So, if you need a fast-curing, high-strength glue for your legos in an economy pack, this is a perfect choice. You will save a ton of money if you end up using all the glue in the bottle.
Rhino Glue Gel, Heavy Duty
This is a heavy-duty reinforced edition of the standard rhino glue. It’s thicker, stronger, and more durable! It is also a great option for gluing legos!
The bonds made with this glue are really sturdy. We recommend using this glue on constructions where there are increased pressure and the possibility of collapsing. The high tensile strength of this adhesive will make sure your building stands the test of time!
Another thing we like about this glue is its thickness. It has a gel-like feel to it and is of around medium viscosity, which is preferred by most people.
It dries clear, which is great for the looks of your bonds and overall construction, as we don’t want any discoloration around the bonded lego bricks.
We highly recommend this industrial-grade glue for legos. It’s a great choice if you have some heavy-duty lego constructions that require serious strength.
Le-Glue - Temporary Glue for Lego
This glue is a great option if you need a lego construction that needs to be strong temporarily but should be later reused. It also works great as a fun experience with your kids, as they can glue the lego pieces together safely thanks to the non-toxic makeup of the glue.
The lego bricks should be up to 10 times stronger with this glue than without. The glue won’t damage the bricks and is easily removed in warm water. You can then reuse the pieces with no complications or residue leftover.
This glue is made additionally safe for kids. It’s composed of non-toxic materials, and as an additional safety feature, the manufacturer has added a bitter taste to the glue.
You can easily apply this glue with a cotton swab or a brush.
This glue provides a great way to have some fun with your kids and make some strong buildings out of lego blocks. It isn’t as strong as the other glues we reviewed, but since it’s made for only temporary bonds, that isn’t expected.
What To Look For When Choosing Glue For Legos
In the following section, we will look at the most important factors to look at before choosing the glue for legos.
The Type Of Glue
There are many types of adhesives or glues that make great bonds on legos since the parts are usually light and small. Polyurethane adhesives, epoxies, cement glues, and cyanoacrylate adhesives all work excellently in bonding the lego bricks.
While the structural strength is sufficient in all these options, there are several other factors that aren’t so favorable.
The first one is the setting and curing time. From these adhesives mentioned above, the cyanoacrylate-based glues or simply superglues have by far the fastest curing times. Some cure in only 10-15 seconds!
On the other hand, polyurethane adhesives, cement glues, and epoxies need hours to set and days to cure. They also usually require clamping of the parts.
Another advantage of superglues is that they are usually much easier to work with. Just apply a drop of the glue from the bottle hold the pieces for 15 seconds, and that’s it! Epoxies usually require mixing the two components and then clamping them for hours.
And finally, the superglue is the most economical option part from the cement glue. The polyurethane and epoxies are simply too pricey and too much hassle for such a simple task of bonding two lego blocks. Cement glues are the next best thing after superglues.
Drying Time
Most of the time, you would want the setting and curing time to be as fast as possible. That should be the case with legos too.
You just want to keep going as fast as possible since there is no need to spend a lot of time joining the parts.
For this, the cyanoacrylate or super glues are the clear winners. They have amazing curing times, and if you use them in combination with a quality accelerator, your bonds will be dry and cured in just 5-10 seconds!
Toxicity
You have to consider the chemical makeup of the glue you will be using for the legos if the construction is going to be used by the kids.
If you store the construction in a small, confined space with no air circulation, then using a water-based, non-toxic glue should be considered.
If you want to glue the legos with your kids, non-toxic glue is a must.
Drying Color
This is a very important aesthetic factor that you should consider when choosing glue for legos. There are quite a few glues that dry a certain color or a mixture of colors.
Some leave a white residue, some black, while some dry clear – colorless. For legos, you should always choose a clear drying glue since you don’t want anything to interfere with the looks of your Lego bricks.
Viscosity
Viscosity or thickness of your glue is also something to consider. If you pick a glue with low viscosity, it will be too liquid and will likely spill from the lego blocks as you are applying the glue to the composite surface.
If you, however, pick a glue with a high viscosity, you will likely increase the curing time.
Your best bet would be to go for a medium viscosity glue as those tend to be what most people prefer for lego blocks.
If you think you will need more time for assembly, you can go with the high viscosity glue, especially if you use an accelerator.
Just make sure to avoid the liquid super glues or any glues with low viscosity as they will make a mess.
How To Glue Lego Blocks
Gluing lego blocks with adequate glue is a very easy and straightforward process.
Here is a step-by-step instruction:
- Put the glue on the circular pins of both of the pieces you want to glue. Don’t put the glue on the edges of the blocks as that will cause the glue to spill out.
- Wait for 20-30 seconds if you’re using superglue. If you’re using an accelerator as well, wait for 5-10 seconds only.
- Clean any leftover glue immediately after mending the two blocks together. If there is any dried glue residue left, use acetone to easily remove it without damaging the blocks.
Simple, right? Just remember to always clean the blocks after bonding them and to use glue that dries clear.
Safety Tips
There are several safety precautions that you should take before you start gluing your legos.
- Wear protective gloves and goggles when working with the glue. They will protect your skin and eyes from chemicals in the adhesive.
- Work in a room with a lot of air circulation. The glue can make you sick if you ingest it for extended periods. If you feel nauseated, go outside and take a breath of fresh air.
- Read the instructions that come with the glue. Don’t skip the parts about how to use the glue and safety advice.
- Close and store the glue container properly. You should tightly close the lid or the cap of the bottle. Store the glue in a cool place to preserve it for later use.
Frequently Asked Questions
Can you glue Legos together?
Sure. You should use a cyanoacrylate adhesive, also known as super glue. Apply the glue on the pins of the blocks and hold them for 20-30 seconds. Your blocks will be tightly bonded.
Will hot glue melt Legos?
Definitely! Never use hot glue unless you want to ruin your lego blocks. We recommend using superglue for bonding lego blocks together.
It’s cheap, cures fast and makes a strong bond.
What is Lego glue?
Lego glue is a temporary glue that can be later removed, usually by using warm water.
It is designed for use on lego buildings that only need temporary reinforcement. It is also usually well suited for kids since there are no toxins in the lego glue.
Conclusion
It really isn’t that hard to pick a glue that will work on your lego blocks. All you really need to remember is to get cyanoacrylate-based glue that dries clear.
Make sure to get a stronger gel version of the superglue to ensure a strong bond and easy application.
All the choices that we reviewed are great for bonding lego parts. You can’t go wrong with any of them!
Now that you know all the necessary information, get some glue and start building amazing and sturdy constructions!
