Working with legos is fun and easy. You can create intricate builds and designs without measuring or cutting anything.

Sometimes you might want to fasten your creation when you’re done.

Unfortunately, getting any regular glue to work on legos is challenging.

Don’t worry! This article will give you a comprehensive list of the best glue options for legos.

Finding a high-performance glue for non-porous materials is complicated enough.

For legos, you’ll also have to find glue that binds the pieces together without melting the plastic and causing unaesthetic lumps.

The sharp, perfectly even edges of lego pieces are especially unforgiving.

Keep reading for more plastic-compatible glues, child-friendly options included!

Suitable Glues for Legos

Lots of glue options are available, so you might be left scratching your head.

Carpenter’s glue, super glue, hot glue, craft glue, gorilla glue, the list seems endless.

However, not every type of plastic glue will give you similar results. For example, spray glue and mod podge might not work.

Legos are made of non-porous plastic, so you’ll need high adherence glue suitable for non-porous materials.

It must be gentle enough not to melt the lego pieces but strong enough to give you a long-lasting bond.

Keeping these factors in mind, you can narrow your choices to these two options. These are the best glues to use on legos.

Polyurethane Glue

Polyurethane glue is highly versatile and works well for both porous and non-porous surfaces.

The only materials it doesn’t work on are polypropylene, polyethylene, Teflon, or silicone.

This glue is powerful enough to use in home-building or repair applications and has a short working time. It’s also perfect for a lego table.

You can safely use it on plastic without worrying about melting your legos.

Cyanoacrylate Glue

Cyanoacrylate glue (common name “Super Glue” or “Crazy Glue”) is an extremely powerful, quick-bonding glue.

It works on both porous and non-porous surfaces, plastic included. This glue even bonds to skin instantly upon application.

Typically, the lego glue takes between 5-90 seconds to work, but curing time takes up to 24 hours.

When the glue is exposed to heat, the curing time can be reduced to 8 hours.

Best 7 Glues for Legos

Below you can find my recommendations for the best glue for legos.

1. Loctite Ultra Gel Control Super Glue

The Loctite Ultra Gel Control Super Glue is a highly versatile adhesive, suitable for non-porous materials like plastic, metal, rubber and wood, leather, paper, and ceramics.

This glue comes in a non-runny gel formula. Thanks to its medium-thick consistency and built-in control tip, this glue is easy to apply and control.

It dries clear, forming a tight, permanent bond in less than one minute

When dry, the glue becomes water, temperature, and shock-resistant.

Remember that this product might not be suitable for children, as its formula could lead to eye, skin, or respiratory irritation.

Loctite Ultra Gel Control Super Glue is also a great option if you need to glue glass to plastic.

2. Gorilla Super Glue Gel

Gorilla Super Glue Gel is a Cyanoacrylate glue with a rubber-particle infused formula for improved stability and shock resistance.

This glue has a thick no-run, no-drip formula for easy and neat application.

It’s perfect for any type of bond, including vertical surfaces.

The narrow tip helps maintain precise application and prevents the glue from drying up.

This adhesive dries clear to form a powerful, durable bond in less than 45 seconds.

There’s no clamping time required, and the product is suitable for plastic and many other non-porous materials.

After curing, the glue is water and shock-resistant. There are, however, some downsides to consider.

This glue could cause serious eye, skin, or respiratory irritation, and it instantly bonds skin and eyes.

As a result, this isn’t a suitable option for children.

Gorilla Super Glue Gel is a good option if you want to glue fabric to plastic.

3. Rhino Heavy Duty Glue

Rhino Heavy Duty Glue holds within seconds and creates permanent bonds.

The company markets its product as “The Faster Stronger Tougher Glue!”, so you can expect a powerful, near-instant result.

The final bond is indestructible and resistant to moisture, heat, impact, shock, and vibration.

This adhesive dries clear in a few seconds, and the applicator tip makes the product easy to use.

The formula is suitable for many materials, including plastic, rubber, glass, ceramic, wood, fabric, brick, and concrete.

The above makes it a great glue for rubber.

4. Glue Masters Professional Grade Cyanoacrylate

Another high-performance Cyanoacrylate glue, the Glue Masters Professional Grade Cyanoacrylate, is perfect for non-porous materials like plastic and glass.

This glue comes in three viscosities, suitable for all sorts of applications.

The thick viscosity is perfect for bonding legos, as thick glue is unlikely to drip or run.

The high viscosity and the control tip make the application easy to measure and control.

This glue also has a short working time. It creates a powerful, long-lasting bond in just 60 seconds and is water and shock-resistant to boot.

5. Krazy Glue Elmer’s Original

Elmer’s Original Krazy Glue is great for semi-permanent bonds. This all-purpose formula is suitable for plastic, rubber, ceramics, glass, wood, and more.

Elmer’s Krazy Glue is a high viscosity adhesive, so it’s easy to apply, spread, and wipe away, and the semi-permanent bond allows for repairs and modifications.

The glue comes out white. Once dry, the bond is water-resistant but not shock-resistant.

While moisture won’t be a problem, a powerful impact might break the bond, disconnecting the pieces.

This glue might cause serious eye or respiratory irritation and allergic skin reactions.

6. Le-Glue

Le-Glue is the perfect match if you’ve been looking for a non-toxic, child-friendly lego glue.

This glue is only made with natural ingredients to ensure a safe, non-irritating formula suitable for children.

You get clean, high-performance glue without compromising on quality. Le-Glue is specially designed with plastic building blocks in mind.

This adhesive is material-compatible; it sets and hardens quickly and creates powerful, stable bonds.

This gentle, non-permanent adhesive won’t damage lego bricks, and you can always remove the glue to start over or reuse the same pieces.

This adhesive dissolves in warm water; it’s removable and leaves no residue.

Le-Glue comes in a grey-ish white color so that it might leave inaesthetic glue blotches on transparent blocks.

However, for opaque blocks, it works just fine. The adhesive takes one hour to set and cures fully in about 24 hours.

This glue might be difficult to apply due to its packaging. It comes in a squeezable plastic bag and has a large dispensing tip.

While the glue dissolves easily in water, you could avoid the messy application by using a small brush to catch the glue and apply it.

7. BrickShield Brick Glue Adhesive Spray

The BrickShield Brick Glue Adhesive Spray is another great, non-toxic, child-friendly product.

This glue comes in spray form, so applying thin layers over wide surfaces is easy.

It’s suitable for non-porous plastic material and works well to bond legos and other types of plastic building blocks.

This glue dries quickly and clearly, forming strong, durable bonds. Full curing time might take up to 8 hours.

Once cured, the bond remains stable, so you’re guaranteed your lego creation won’t come crashing unless you want it to!

BrickShield Brick Glue is water soluble, so you can dissolve the glue and reuse the legos whenever you want.

Keep in mind that extended use might damage the blocks. This glue might also not be suitable for heavy-weight projects.

It can also be used as glue for plastic toys, other than just legos.

Tips for Gluing Legos

Legos are made to connect and stay in place. But getting them to stick together is a different story.

To do that, you’ll need powerful, high-quality glue. You should choose a glue specially designed for non-porous surfaces and plastic materials.

Once you find the perfect glue, you’re ready to bond the blocks together to create a long-lasting masterpiece.

The blocks hold themselves together, and the glue does the other half of the work.

All you have to do now is facilitate the process.

For the best results, consider the following tips:

• Always follow the instructions on the label. Different glues require different conditions for optimal performance. Pay attention to clamping time, temperature requirements, and counterindications.
• Clean the blocks of any dust or debris to allow the glue to work optimally. Make sure the blocks are dry before applying the glue.
• Opt for a gel-like consistency. The glue should be soft enough to spread easily but not thin enough to run or drip.
• Pay close attention to details. You should calculate beforehand where you want to apply the glue and how much you will apply. A thin dispensing tip makes your work a lot easier. If your glue has a wide dispenser, try picking up and applying the adhesive with a thin brush.
• Never apply too much glue! It might seem counterintuitive, but using too much glue will make your legos less likely to stick together. The more product you use, the longer the drying time and the chances that the glue might spill from underneath the blocks. A thin layer of adhesive is more than enough.

You don’t want to be left with a sticky mess when cleaning all the excess glue spilling out the sides.

Wrap Up

When you want your lego creation to last, the right plastic glue will help you.

There are great options, including child-friendly, non-toxic ones like Le-Glue or the BrickShield Brick Glue Adhesive Spray.

You have to decide on what type of result you’re looking for. Do you want a water-resistant or water-soluble adhesive?

A spray adhesive or a liquid glue? Do you prefer a short working time or want to do things at a slower pace?

All these factors come into play when choosing the perfect glue for your needs. I’ve tried to include as varied a list of options as possible.

Hopefully, this article has helped you find the perfect adhesive for your project.