Lash artist doing eyelash extension

Humidity and Temperature: How Do they Affect Lash Extensions?

Humidity and temperature? These are two of the most important factors that can affect your lashing application and they play a significant role when talking about lash extension. How well you pay attention to these factors can make or break your lash extension application. So, you better be knowledgeable about these two.

Professional lash artists like you must know that humidity and temperature have direct impact on ensuring quality work in your lashing. Drying time and viscosity are based on the temperature and humidity of your lash room, so if you want to get the best retention and quality application, you need to be aware on how to control your room environment. 

Glue Ingredients: How is it related to humidity and temperature? 

Unlike other adhesive ingredients that cure by heat or evaporation, cyanoacrylate, the main and active ingredient of lash glue, cures in the presence of moisture. The amount of water in the air is guarded by the concept of humidity. This undergoes a chemical reaction, polymerizes, sparks a chain reaction, and solidifies when it comes into touch with moisture in the air known as "curing." Glue ingredients are the main reason why it is important to regulate room temperature. 


The ideal humidity level of your lash room is 40% - 60%. Too much or too little of these levels can make a big difference in your lashing. Maintaining the right lash room atmosphere and keeping humidity at its ideal level lessens the possibility of discomfort and other unfavorable reactions both before and after lash application. In addition, this makes your lash glue to function at its best, producing eyelash extension that is durable and has longer retention. 

A moist window and a thermometer monitoring humidity and temperature

Low Humidity 

Low humidity causes adhesive particles to set and dry much slower than they should which results in extended lash application time than usual. The curing process will take longer if the relative humidity is too low because there won’t be enough moisture to “cure” the lash glue. Additionally, your lash client will have poor retention because the adhesives will stiffen and harden. 

Ideal Temperature And Humidity For Eyelash Extensions

The ideal temperature and humidity for eyelash extensions can vary slightly depending on the adhesive being used and the preferences of the lash technician. However, generally speaking, the optimal conditions for applying eyelash extensions are:

  1. Temperature: Ideally between 68°F (20°C) and 72°F (22°C). Temperatures outside of this range can affect the drying time of the adhesive and the comfort of the client.

  2. Humidity: Ideally between 40% and 60%. Too much humidity can cause the adhesive to cure too quickly, leading to poor bonding, while too little humidity can cause the adhesive to take too long to cure, prolonging the application process.

Maintaining these conditions helps ensure proper adhesion and longevity of the eyelash extensions. Lash technicians often use tools like temperature and humidity gauges to monitor and control these factors during the application process.

Tips to help you when you experience low humidity: 

  • Select the right adhesive 

Decide which adhesives best suit your environment. The glue will dry significantly slower in low humidity conditions, so choose an adhesive with a quick dry time.

  • Adjusting your technique 

You should only apply the right amount of drop of adhesive to your lash glue jade stone gasket or anything you use for your lash glue in a low-humidity atmosphere. It will dry more quickly the less you pick up. To achieve this, slowly dunk your extension's bottom 2–4 mm into the glue and draw it out. This stops an adhesive ball from forming at the base of your eyelash extension.

  • Control your lash room environment

Get a humidifier to regulate your lash room environment. This will make your space more humid and hasten the drying of your adhesives.

High Humidity

Cold weather causes outdoor air to become moist, consequently increasing humidity. Under an excessively humid environment, shock polymerization happens - chemical reaction when lashing glue cures and dries too quickly. The bond becomes excessively weak and stiff and causes premature shedding. It is suggested that you use a dehumidifier and replace the glue drop every 10 to 15 minutes to keep it fresh. This is why you need to also invest in a dehumidifier to balance humidity in the air.  


Tips to help you when you experience high humidity: 

  • Select the right adhesive 

Recall how your glue will cure more quickly at a greater humidity level. Choosing an adhesive with a slower dry time is one approach. Because of the high humidity, the glue will dry more rapidly, giving you just enough time to do your lash application. 

  • Adjusting your technique

If you are operating in a location with high humidity, adjust your technique. To adapt to high humidity, it is vital to isolate first, then immediately attach your extension. The more glue you get on it, the longer your lash extension is to cure. In an area with high humidity, you can benefit from this. (However, since using a lot of glue isn't optimal, we advise utilizing alternate methods.)

  • Control your lash room environment

Control your surroundings by lowering the temperature of the room and purchase a dehumidifier to assist in reducing the humidity in your workspace. In general, you want your temperature to be low while the humidity is high. This adds a little more balance and contributes to and creates a more conducive working environment for both you and your lash client.


Lash salon also needs to maintain the consistency, functionality, and longevity of the products as well as the comfort of their lash clients. Thus, you should also consider your temperature in your lash salon. The ideal room temperature should be between 68 - 71 degrees Fahrenheit. Temperature changes will cause eyelash glues to alter in consistency and characteristics, making them more difficult to apply and causing applied eyelash extensions to last considerably less time. 

On the other hand, in cold weather outdoors, the low temperature can also cause the lash glue to dry more slowly if the correct humidity and temperature settings are not adjusted in your lash application. Adding to it, lash glues tend to become more sticky and thicken in cold weather. 


How can I monitor my humidity to reduce the risk of negative reactions and improve adhesive performance?

Using a hygrometer is the easiest way to monitor your humidity and temperature at your lash salon. Using these indoor thermometers and humidity monitors, you can ensure your ideal level which becomes easier for you and won’t be a problem in your lash application session. 

What to expect when humidity in the lash room is too low or too high? 

Controlling humidity in the environment might be a little challenging. When humidity is too low, the curing process is also slow. The adhesive dries too slowly which can cause a delay in the application, on the other hand when it is too high, the lash glue dries quickly which results in weak retention and lash extensions are difficult to attach to lashes. 

Humidifier set.up in a lash room.

Importance of Humidity and Temperature: Does it Affect the Lash Extension application?

Yes, humidity and temperature have big roles in lashing and definitely affect your performance, quality, and result. Not following the required humidity and temperature level affects before, during, and after lash extension application. When you check and secure proper humidity and temperature, it can result in an easy application and good quality lash extensions for your lash clients.  As a lash artist, you want to provide quality craft and satisfy your lash clients in the best possible way. Paying attention to these aspects can take your lash game to the next level. 

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1 comment

Dear webmaster, Good work!

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