Whether you are new to the lash business or are an experienced lash artist you must have heard or asked this one particular question: “What’s the best lash glue?”

I have asked and have been asked. Back when I wasn’t aware how important it is to know all the things that are responsible for good retention (this is in fact what we are looking for, right?), I was always keeping one eye on new products, thinking the best glue is yet to come. But as with life in general, everything you need right now, is already here for you - the same goes for finding the best glue for eyelash extensions. 

Confused? Let’s dive into the pursuit for Mr. Right - the ideal glue that will keep you and your clients happy and satisfied.

I’ll be honest - the truth is that there's no singular ‘best’ glue for eyelash extensions. All glues are strong, and capable of lasting 5+ weeks on the lashes. Even more confused? Good! This means you are taking all words into consideration! Which is exactly what you should be doing when seeking the perfect lash adhesive to work with. You should consider everything that affects the retention of the eyelash extensions. 

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    Of course you should pay attention to all of the above if you want to achieve amazing retention, but let’s first discuss theTemperature and humidity of your work environment. 

    All lash adhesives contain varying amounts of the same ingredients: cyanoacrylate, stabilisers and black pigment (if the glue is black). Cyanoacrylate is the ingredient that is responsible for creating a quick bond, while stabilisers are there to reinforce this bond, making it strong and long lasting. The more cyanoacrylate present in the glue, the less stabilisers it contains. This means adhesives with more cyanoacrylate dry more quickly. It really is that simple, and it goes for all lash adhesives, no matter the brand. So what exactly is it that’s making them different to one another?


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    It’s how they react to the environment! In order to cure, cyanoacrylate needs moisture (humidity) which it attracts from the environment, and from the client’s lashes.If the humidity in your room is high, your lash extensions glue will dry quickly, but if the humidity level is low, the lash adhesive will dry slowly. Note that, when we talk about humidity level, we are referring specifically to the humidity that is in your workspace, not the one your smartphone is showing you for the weather outside - invest in a hygrometer for accurate temperature and humidity readings so that you can be sure you're getting the best out of your lash glue!

    Ready to sprinkle some water drops onto client’s lashes in order to make your adhesive work faster? Not so fast! If you happen to add too much moisture, the adhesive will shock polymerise, making the bond with lashes fragile and easy to break. How do you know you’ve got shock polymerisation? The glue will turn white on the lashes! Maybe you’ve seen this before if a client’s eyes have watered?  


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    Now, imagine someone buying a quick drying lash glue and using it in a beauty room that has 60% or even higher humidity level - this already quick drying eyelash extensions adhesive will become even quicker - approximately a full second quicker! If this person is an experienced lash technician, this may be no problem. But if they are less experienced, then this situation would most likely bring about poor retention and complaints. This is because theirwork speed is simply not in tune with the speed of the glue at that humidity level. 

    So how does room temperature affect lash retention? Will a higher temperature mean a faster drying time? The fact is that cyanoacrylate does not love high temperatures - at 80 degrees Celsius it loses half of its strength. Have you ever had a client come back with barely any lashes and after a little investigation you find that they regularly use the sauna, take part in spin classes, or play squash on the weekends? There’s your answer - the glue is reacting to its environment, even after curing!

    Most eyelash extensions adhesives perform best within a range of 45 - 55 % humidity, and 20 – 22 degrees Celsius (68-72F). As with all things in life, there are always exceptions to the rule! Luckily, some lash adhesives have a wider working range which is very convenient if you have problems with controlling the conditions in your work space, for example if you are working within a hair salon. OurFlexie glue for eyelash extensions is a perfect solution! As the name suggests, this lash glue is very flexible when it comes to working conditions. It works in humidity levels that range from 40% to 70% and between 18 to 22 degrees Celsius, forming an elastic bond which I found out was a real lash saver with clients who go to hot yoga a few times a week! If you prefer to work more slowly, Lady Bond will be your best friend, and if you’re very fast (like, SUPER fast) Royal Bond will be a game changer!

    What if your conditions are perfect for the glue, but you’re STILL seeing retention issues? Well, it could be drying too fast. Have you ever brushed through a set of lashes and seen your extensions simply pinging off? This is because the glue is beginning to cure before it can form a strong bond between the extension and the natural lash. If you experience issues with a glue, look for a slower drying time - this will give you time to place and correct the extension without sacrificing retention time.

    Hopefully now you can understand why there really isn’t only one best lash glue out there, and why we might ask you more questions when you ask us which is the best glue for eyelash extensions. When choosing your lash glue, you should consider your working environment's conditions and also how experienced a lash technician you are, rather than looking for the strongest, fastest glue. 


    Written by Guest Blogger, LLP Trainer in Slovenia Nives Špehar,