UV lash glue: what lash artists should know before switching

Written by Liliana Prodan, an internationally trained and multi-certified lash technician with hands-on experience using UV/LED lash systems in professional lash services.

After working with the UV/LED system for almost two years, testing different devices and adhesives, investing in education and learning through my own experience, I finally feel confident enough to share what I’ve learned and explain this system in simple words.

This isn’t a scientific paper. And it certainly isn’t a replacement for a training course.

Let’s simply call it what it is: an introduction.

What is the UV/LED system?

The easiest way to describe it is this:

It’s simply a different way of curing lash adhesive.

With a normal adhesive, curing happens through moisture in the air and the natural lash.

The UV/LED system works differently.

It relies on two essential parts:

• a UV/LED device that produces UV light
• a compatible UV adhesive

Think of them as a team: the device emits a specific wavelength of UV light, and the adhesive is designed to respond to that wavelength of light.

That’s why it’s called a system.

Neither the lamp nor the adhesive is designed to work on its own, they’re designed to work together.

If you are already familiar with traditional adhesives but want a deeper understanding of how lash glue behaves, you may also find our lash glue guide helpful.

So what makes UV adhesive different?

You may have noticed that I specifically mentioned a compatible UV adhesive. That wasn’t by accident.

Not every lash adhesive can be used with a UV/LED device.

UV adhesives contain special ingredients called photo initiators. These ingredients are designed to respond to a specific wavelength of UV light. Once they’re activated, they trigger the curing process.

That’s why a regular lash adhesive doesn’t suddenly become a UV adhesive just because you shine a UV/LED device on it.

It’s also worth mentioning that most UV adhesives are still based on cyanoacrylate, just like traditional lash adhesives. It’s the addition of photo initiators that changes the way the adhesive cures.

Does that mean humidity and room temperature no longer matter?

Not exactly. One of the biggest surprises for me after switching to the UV/LED system was realising that environmental conditions didn’t disappear, they simply played a different role.

The UV/LED device controls when the adhesive cures. But your working environment can still influence how the glue behaves while you’re working.

Temperature can still affect the glue drop, its consistency, how it picks up and, ultimately, how it feels to work with.

So yes, the UV/LED system gives you much more control over the curing process, but good working conditions still matter.

If retention is something you struggle with in general, this guide on why lash extensions don’t last explains more about the different factors that can affect results.

UV adhesive vs regular adhesive

Before we move on, here’s a simple comparison that puts everything we’ve talked about side by side.

Why is the UV/LED system so interesting for lash technicians?

Every innovation becomes popular for a reason. The UV/LED system didn’t become popular simply because it’s something new. It became popular because it solves real challenges that many lash artists face every day.

For some, it’s the constant battle with changing humidity and temperature. For others, it’s achieving better retention. And for many, it’s simply having a more predictable workflow.

Everyone has their own reason.

If you are looking at UV adhesive because of retention, you may also want to read our guide on how to improve lash retention with premade fans.

Even though that blog focuses on premade fans, the same principle applies: retention is rarely about one product alone.

What was mine?

The allergy made me look for another way, the control made me stay.

Was the switch easy?

Not really. Like every new technique, I had to readjust my movements, my timing and my habits.

At first, it didn’t feel nearly as natural as it does today. I tested different devices, different adhesives, different settings.

I observed, I adjusted and I learned what worked for me.

What do you need to start?

More than just a bottle of UV adhesive.

You’ll need:

• a professional UV/LED device designed for lash extensions
• a compatible UV adhesive
• the correct safety procedures
• proper education

This article is meant to be an introduction, not a replacement for training.

A good course helped many things finally click for me. And if you decide to explore the UV/LED system seriously, I’d genuinely encourage you to learn it properly.

Because I truly believe there’s a right way and a wrong way to do things.

Safety and training matter

The goal isn’t simply to switch to a different system, but to understand the system you’re working with and use it safely, correctly and confidently.

Choosing UV lash adhesive

If you decide to work with a UV/LED lash system, the adhesive and lamp need to be compatible.

At The Lash Box Shop, you can explore professional UV/LED lash adhesives alongside our wider glues and liquids collection.

You can also explore our full eyelash extension glues collection if you want to compare traditional and UV/LED adhesive options.

Final thoughts

If you’re not sure where to start, or if you simply have questions, feel free to reach out on Instagram @lilprolashes

I’ll always be happy to share my own experience, tell you what worked for me, and point you towards the course and trainer that helped me understand the UV/LED system better.

Because the best decision isn’t a rushed one, it’s an informed one.

Frequently asked questions about UV lash glue