What exactly is lash prep? Is it necessary to use prep for lash extensions? How should you apply lash prep? Should you allow the eyelash prep to dry? In this blog, we will explore the world of lash prep and its application techniques.
Taking the time to cleanse your client’s natural lashes with a lash bath prior to applying prep can yield numerous benefits. Not only does it simplify the prep process, but it also nourishes and conditions the natural lashes, rendering them more manageable during application.

Many lash artists find themselves perplexed when it comes to understanding the purpose of lash prep and how to effectively prepare the lashes. It is my belief that without proper lash prep and preparation, you may encounter difficulties with lash retention.


Determining whether a client has oily lashes can be challenging as it is not always evident, and sometimes you only discover it when the lash extensions start slipping off. If you are experiencing lash retention issues despite having ideal humidity and temperature conditions, incorporating a lash prep may be necessary. It is crucial to comprehend the when and why of using lash prep to achieve optimal lash retention.


A lash prep is a pre-treatment for eyelash extensions aimed at improving their longevity. Prior to applying the prep, I suggest performing a lash bath for your clients. Some lash artists opt to offer a thorough lash bath to all clients, whether it’s for full lash sets or fills, in order to cleanse the lashes before beginning the application process. The purpose of a lash prep is to eliminate natural oils from the lashes while maintaining their pH balance, facilitating the adhesion of extensions to the natural lashes. It effectively removes excess oils, enabling easier attachment of extensions. Utilizing a lash prep can significantly enhance lash retention.


If a client has parched skin, using a lash prep on their lashes will exacerbate the dryness, impeding optimal absorption of the adhesive. An eyelash prep is necessary if a client possesses greasy skin and oily lashes.



Lash prep can be directly administered to the natural lashes using a lip gloss brush prior to attaching lash extensions. It eliminates residues and the accumulation of oil on the natural lashes, which can contribute to blepharitis, while also priming the natural lashes for improved adhesion of the lash extensions. Regardless of whether your client utilizes eye cosmetics, the accumulation of oil and proteins can occur throughout the day. Therefore, it is crucial to cleanse and prepare the natural lashes prior to applying lash extensions.
When administered to the natural lashes and skin, lash is extremely gentle on the eyes and does not cause irritation.


Prepare two applicators (2 per eye) to ensure the prevention of oil or residue transfer to the other lashes. When administering the primer, it is crucial to apply it both on the upper and lower lash lines since oil is not solely present on the surface of the lash line but can also accumulate underneath. Some lash technicians may encounter challenges with retention, necessitating a return to fundamental practices, including the essential step of priming underneath the lash.



Allow the lash primer to fully dry on the natural lashes before proceeding with the application of lash extensions. Ensure that you apply the primer consistently from one corner to the other, covering both the upper and lower lash lines. Begin at the lash root and gradually move upward, maintaining a continuous motion. It is crucial not to pause during the process, especially when dealing with any accumulation of residue, oils, or previous makeup. Starting from the lash base and progressing upward is recommended. Additionally, alternating back and forth several times can also be beneficial.

TIP: You will need a disposable wooden applicator to soak up any surplus moisture and safeguard the client’s eyes from potential entry during the application of lash primer.

Is lash primer essential for every client? Don’t let a small product confuse you! Ensure that you understand when and why to use it—and when not to.
⦁ Incorrect usage of lash primer can lead to poor retention and harm the natural lashes. When used correctly, lash primer can expedite the lash application process and enhance retention. However, it is only suitable for specific clients.
⦁ Applying primer to the lashes of a client with dry skin can exacerbate dryness, hindering the adhesive’s complete attachment to the natural lashes.
⦁ Primer is only necessary for clients with oily skin and lashes, or those with an imbalanced pH. It also facilitates a more seamless application by removing surplus oil from the client’s lashes.
⦁ If you opt to use primer, ensure that it dries thoroughly before applying lash extensions to avoid the risk of shock polymerization.

The Surgics

The Surgics

Eyelash Tweezers Provider for Lash Extensions