Cyanoacrylates

Cyanoacrylates are the main active ingredient found in most eyelash extension glues. These molecules form strong bonds with other materials and help keep lash extensions firmly attached to natural lashes. Cyanoacrylates are made up of two substances: ethyl cyanoacrylate and methyl cyanoacrylate. Ethyl cyanoacrylate is more commonly used as it has a longer bonding time than methyl cyanoacrylate, but it can cause irritation if it comes into contact with the skin or eyes. Methyl cyanoacrylate has a shorter bonding time but is less likely to irritate when it comes into contact with skin or eyes.  

Methanol

Methanol is an alcohol commonly found in eyelash extension glue to act as a solvent for the cyanoacrylate molecules. This helps break down the particles so they can bond more easily with natural lashes and help keep them attached for longer periods. Methanol also acts as an adhesive activator, meaning that once it comes into contact with moisture from natural lashes, it will activate the adhesive properties of the glue and allow it to form stronger bonds with natural lashes.  

Polymers

Polymers are another common ingredient found in eyelash extension glues which help thicken the solution and give it a smoother consistency so that it can be applied easier and adhere better to natural lashes without causing irritation or discomfort. Polymer-based glues are typically more expensive than non-polymer-based glues, but they tend to have longer bonding times, making them worth the extra money if you want your extensions to last longer on your clients' lashes. Polymers also help prevent any clumping or flaking during application which can lead to premature shedding or damage to natural lashes.