The Truth About Lash Glue Allergies: What’s Really Causing the Reaction?

For lash technicians and beauty brands, client allergies and sensitivities to lash glue can be a significant concern. Many assume that cyanoacrylate, the main bonding agent in lash glues, is the culprit. However, through extensive research and industry experience, we’ve found that Hydroquinone (HQ), a common stabiliser used by many manufacturers, is often to blame. Understanding what triggers these reactions and how to choose a safer lash glue can help technicians provide a more comfortable experience for their clients while reducing the risk of adverse reactions.

Common Symptoms of Lash Glue Allergies

Clients experiencing a sensitivity or allergic reaction to lash glue may report symptoms such as:

Redness or swelling of the eyelids
Itchy or watery eyes
A burning sensation or discomfort during or after application
Flaking or peeling skin around the lash line

These symptoms can appear within minutes of application or develop over time with repeated exposure. While some reactions may be mild, others can be severe enough to prevent clients from continuing with lash extensions.

What’s Really Causing the Reaction?

The lash industry has long assumed that cyanoacrylate, the key ingredient in most lash glues, is the primary cause of allergic reactions. While cyanoacrylate can produce fumes that may irritate sensitive clients, true allergic reactions to this ingredient are relatively rare. Instead, one of the most overlooked culprits is Hydroquinone (HQ)—a stabiliser added to many lash glues to prevent premature curing.

Why Is Hydroquinone a Problem?

Hydroquinone is a known irritant and allergen, often causing redness, itching, and inflammation when it comes into contact with the skin or eyes.
It has been banned in cosmetic products in the UK and EU due to safety concerns and is heavily regulated by the FDA in the U.S.
Unlike cyanoacrylate, which primarily affects clients through fumes, Hydroquinone remains in the adhesive even after curing, increasing prolonged exposure and the likelihood of irritation.
Clients who initially tolerate lash glue may develop an allergy over time due to repeated exposure to HQ, leading to delayed reactions.

For lash technicians, this means that choosing the right lash glue isn’t just about curing speed or retention—it’s about safety and reducing unnecessary allergens.

How to Minimise Sensitivity and Allergic Reactions

If you have clients who frequently react to lash glues, consider the following steps:

Switch to a Hydroquinone-Free Lash Glue
- Many lash glues still contain HQ, even if it isn’t listed prominently on the packaging. Opting for a Hydroquinone-free adhesive significantly reduces the risk of irritation and allergic reactions.
Choose a Lash Glue with Butylated Hydroxyanisole (BHA) Instead
- At CAM, we’ve replaced HQ with Butylated Hydroxyanisole (BHA), a far safer stabiliser that ensures the adhesive remains stable while reducing sensitivity risks.
Use the Right Lash Glue for Each Client
- If a client has previously experienced sensitivity, opt for a Methoxy-based lash glue with a lower fume output and gentle formulation. Our 1-second curing sensitive lash glue is specifically designed for clients with reactive skin.
Ensure Proper Application and Aftercare
- Use well-ventilated spaces when applying lash extensions.
- Avoid applying too much adhesive, as excess glue can increase the chances of irritation.

Why We’ve Always Been Hydroquinone-Free

Unlike many manufacturers who still use Hydroquinone in their lash glues, we’ve always prioritised safe, high-performance alternatives. Our lash glues are:
✅ Hydroquinone-free – reducing the risk of irritation and long-term sensitivities
✅ Manufactured in the UK – ensuring compliance with UK, EU, and U.S. regulations
✅ Available worldwide – trusted by lash professionals globally
✅ Suitable for all technicians – offering both ultra-fast Ethyl-2 based glues and sensitive Methoxy-based alternatives

For lash brands and technicians looking to offer the best for their clients, making the switch to a safer lash glue is essential.

Ready to Switch to a Safer Lash Glue?

If you’re concerned about Hydroquinone in your current lash glue or have clients experiencing sensitivity, it’s time to make the change. Our Hydroquinone-free lash glues offer industry-leading retention, fast curing times, and reduced irritation—without compromising on performance.

Contact us today to learn more or try our Hydroquinone-free lash glues.

The Truth About Lash Glue Allergies: What’s Really Causing the Reaction?