Does Eyelash Glue Expire? Things That You May Not Know

For the flourishing industry of eyelash extensions, quality and safety are paramount. As a lash technician, one of the most crucial aspects of your work is ensuring the safety and satisfaction of your clients. Among the many factors that contribute to a successful eyelash extension application, the quality and condition of the adhesive—often referred to as glue—are of utmost importance.

In this article, we delve into the question: Does eyelash glue expire? We will explore various aspects surrounding the expiration of eyelash extension glue and provide insights that every lash technician should know.

Does Eyelash Glue Expire? If Yes, When?

A frequently asked question is, “Does eyelash glue expire?” Well, it does (just like every other product), and you’d better purchase an appropriate amount of eyelash glue, along with a few extra as backups, to ensure long-lasting, and effective results. Eyelash glue that has passed its expiration date may result in poor lash retention, one of the least desirable outcomes.

The main ingredient in lash glue, cyanoacrylates, does have a long shelf life as long as it is stored correctly, and used according to instructions. When unopened or stored properly, your lash glue can last up to 3 to 6 months from the manufacturing date. But once it is opened, its lifespan will become shorter. This will be dug deeper to a greater extent in the sections below.

When using lash glue on any of your clients, it’s more ideal to be utilized within four weeks of opening. This ensures optimal performance and reduces the risk of poor lash retention, or all those adverse reactions. It is important to follow the manufacturer’s guidelines and check the expiration date to ensure the adhesive is still within its usable period.

Prioritize client safety and satisfaction by avoiding using expired products that may lead to subpar lash retention or dissatisfaction among clients. Moreover, expired lash glue may also increase the risk of any adverse reaction. If the ultimate goal is to please your clients, always  make sure to offer them reliable and fresh lash glue.

>> Explore more detailed information about eyelash extension glue in the article: Everything you need to know about lash extension glue from A to Z

Signs of Expired Eyelash Extension Glue

There are several signs that indicate lash glue has expired. If you notice any of these signs, it is best to discard the glue and replace it with fresh and unexpired products to ensure optimal results and safety for your clients’ natural eyelashes.

Expired lash glue may become thicker, clumpy, or stringy in texture. It also loses its adhesive properties and fails to create a strong bond. The color of the lash glue may change over time, becoming darker or exhibiting other discoloration when expired. If your lash glue emits a foul or unusual smell, it could be an indication of expiration.

Expired lash glue may not provide the desired lash retention or longevity. Lashes may start to fall off sooner than expected or not adhere properly, as well. Using old or expired lash glue is fiercely discouraged and must never be done. The potential risks and negative consequences outweigh any benefits. When lash glue is outdated, it may lead to poor lash retention, which causes the extensions to fall out prematurely. Your clients’ eyes are also more susceptible to adverse reactions when exposed to any expired product ingredients.

To ensure optimal safety and quality, it is vital to always use those fresh and up-to-date lash glues on your natural eyelashes. The presence of bacteria and fungus underneath the lash glue can result in infections, which lead to symptoms such as swelling, redness, and significant discomfort in the eye area. Also, the lashes themselves can potentially cause irritation to the cornea. Furthermore, as the glue thickens, it may detach and potentially scratch the cornea, posing further risks/complications.

>> Read more: Lash Glue Allergy: Causes And Treatments

Factors Affecting Eyelash Extension Glue Expiration

1. The Manufacturing Date Of The Glue

The first factor to consider when assessing the freshness of a lash glue is the manufacturing date. This date holds significant importance as it shows the initial exposure of the glue to air, which initiates its deterioration process. Lash extension glue tends to release a specific type of gas once it is formulated. If this builds up and expands within an airtight bottle, it can cause the bottle to explode. Hence, it’s crucial to store lash glue in a bottle that allows for proper airflow. PE, a breathable plastic, is considered the most suitable material for lash glue that facilitates minimal airflow and prevents the glue bottle from exploding.

When kept in optimal conditions, unopened adhesive can maintain its best quality for a maximum of 6 months. Many lash brands don’t directly indicate the manufacturing or expiration date on their product packaging. Instead, they typically include a batch code or lot number, which is printed on the container bottom or product packaging.

2. The Date When The Glue Is First Opened

The second factor to consider is the duration after opening the lash glue for the first time. If a product is exposed to air, its quality begins to deteriorate at a faster rate. Once opened, lash glue will expire within approximately a month, with the sensitive one, which expires slower (5 weeks to 3 months) compared to the regular eyelash glue. It is vital to keep track of the date when you initially open the product.

One effective way is to use a sharpie to clearly mark the opened date on the back of the package. Also, maintaining the appropriate temperature and humidity levels in the storage area, along with paying close attention to proper storage methods, can help prolong the expiration date of the lash glue.

For more details on how long lash glue often lasts, check out: Unlock the Mystery: How Long Does Lash Glue Last?

3. Storage Conditions

Proper storage is crucial for maintaining the integrity of eyelash extension glue. Exposure to heat, humidity, and light can accelerate the degradation process, causing the adhesive to lose its effectiveness more quickly.

4. Air Exposure

Eyelash extension glue reacts with moisture in the air to cure and form a bond. However, prolonged exposure to air can lead to polymerization, causing the glue to thicken and become less adhesive over time.

5. Container Quality

The quality of the adhesive’s packaging can also impact its shelf life. Airtight containers with minimal exposure to air and light help preserve the adhesive’s potency for a longer duration.

6. Chemical Composition

The chemical composition of eyelash extension glue plays a significant role in its longevity. Adhesives with higher quality ingredients and formulation tend to have a longer shelf life compared to those with inferior ingredients.

Tips for Preserving Eyelash Extension Glue

Lash glue can be temperamental, but with proper care, it is likely to extend its lifespan just by storing opened adhesive in a cool, dry place and ensuring to shake it before each use, which can increase its longevity to around 6 months. 

• Burp the lash glue bottle: Air exposure can cause lash glue to dry out and expire faster. So regularly burping the bottle will help remove air and keep it out. Shake and replace the cap after giving the lash glue bottle a good burp before adding another drop.

• Keep your distance from natural fibers: Eyelash glue reacts with natural fibers, most commonly, cotton or paper. To clean the nozzle, avoid using cotton products. 
• Store in a Cool, Dry Place: Keep your adhesive stored in a cool, dry environment away from direct sunlight and humidity. Consider investing in airtight containers or silica gel packs to minimize exposure to moisture.
• Rotate Stock Regularly: To ensure you’re always working with fresh adhesive, practice a first-in, first-out (FIFO) approach when restocking your inventory. Use older bottles of glue before opening new ones to prevent waste and ensure optimal performance.

• Shake up your lash glue: Always shake the lash glue before any use. Similar to foundation bottles, the ingredients can separate, so shaking ensures proper consistency. 

>> Shaking your lash adhesive: Why is it important?