Summer can be amazing for business—but it can also be a little tricky when it comes to lash extension retention.
If you've noticed your adhesive behaving differently, your lash sets curing faster than usual, or clients suddenly experiencing retention issues, temperature and humidity may be the culprit.
Lash extension adhesive is highly sensitive to its environment. Understanding how heat and humidity affect your adhesive can help you troubleshoot application problems, improve retention, and keep your adhesive performing the way it should.
Why Does Heat Affect Lash Extension Adhesive?
Lash extension adhesives are made with cyanoacrylate, which is sensitive to environmental conditions.
When adhesive is exposed to higher temperatures, the molecules within the adhesive can expand temporarily. This can affect how the adhesive behaves and, depending on the conditions and length of exposure, may impact its overall performance.
This is especially important during the summer months when both your salon and shipping conditions can become significantly warmer.
What Can Happen When Adhesive Gets Too Hot?
Depending on the adhesive and how long it has been exposed to heat, you may notice:
- Faster or unpredictable curing
- Changes in adhesive consistency
- More difficulty creating clean attachment points
- Poorer retention
- Increased sensitivity to changes in humidity
- A shorter usable life after opening
This doesn't necessarily mean your adhesive is ruined—but it does mean you should take steps to get it back into an appropriate environment before using it.
What About Humidity?
Humidity is just as important as temperature.
Cyanoacrylate cures in the presence of moisture, which means the humidity in your lash room directly affects how quickly your adhesive polymerizes.
Higher humidity generally causes adhesive to cure faster, while lower humidity can slow the curing process.
The key is finding the humidity range that works with the specific adhesive you're using.
For example, some adhesives are designed to perform well in higher humidity, while others are formulated for drier environments.
That's why there isn't one "perfect" adhesive for every lash artist.
Your adhesive should match your environment and your application speed.
How to Choose the Right Lash Adhesive
When choosing an adhesive, don't just look at the advertised dry time.
Pay attention to:
Dry time: Are you working quickly enough for a 0.5-second adhesive, or would a 1–3 second adhesive give you more control?
Humidity range: What is the average humidity in your lash room?
Temperature: Is your salon consistently within the recommended temperature range?
Application speed: Your adhesive needs to match your pace. If you're working slower than the adhesive's curing speed, you may experience poor attachment and retention.
At Honeybee Lash Co., we offer adhesives formulated for different working environments and application styles so lash artists can find the right fit for their technique.
What Should You Do If Your Adhesive Gets Hot During Shipping?
This is especially important during the summer.
Your package may spend hours sitting in a hot delivery truck, warehouse, or mailbox before it reaches you. Even if your salon is perfectly temperature controlled, the adhesive may have experienced significant heat during transportation.
If your adhesive arrives warm, don't immediately open it and start working with it.
Instead:
- Bring the package inside as soon as possible.
- Keep the adhesive upright.
- Place the unopened adhesive somewhere cool so it can return to an appropriate temperature.
- Once it has cooled, allow it to acclimate before using it.
- Store it according to the manufacturer's recommendations.
If your adhesive has been exposed to extreme heat for an extended period, monitor its performance carefully.
A Quick Summer Lash Room Checklist
Before your next appointment, take a minute to check your environment.
Temperature: Keep your lash room within the temperature range recommended for your specific adhesive.
Humidity: Use a hygrometer to monitor the humidity rather than guessing.
Adhesive: Check the adhesive's recommended temperature and humidity ranges before using it.
Application Speed: Make sure your adhesive's dry time matches your working speed.
Replacement Schedule: Fresh adhesive performs better. Follow the manufacturer's recommended replacement schedule rather than trying to stretch a bottle beyond its useful life.
Shipping: During hot weather, bring your adhesive inside as soon as your package arrives.
The Bottom Line
When your lash adhesive suddenly starts acting differently, don't immediately blame your technique.
Check your environment first.
Temperature, humidity, adhesive age, storage, and application speed can all affect how your adhesive performs. The more consistent your environment, the more predictable and reliable your results will be—and the happier your clients will be with their lash retention.
At Honeybee Lash Co., we believe great retention starts with great education. Understanding your products and learning how to work with them in different environments is one of the best things you can do for your clients and your business.
Your adhesive isn't just a product sitting on your lash cart. It's a chemical reaction and your environment matters.