Oct 20, 2025

Eyelash Extension Repair & Fills: Guide to Timing & Longevity

Eyelash extensions are a popular beauty treatment that enhances your eyes, and naturally, you want to keep them looking beautiful for as long as possible, right? The key to achieving this is "repair," often referred to as a "fill."

This time, based on the provided PDF material, we'll clearly explain what eyelash extension repair (or fills) entails, why it's necessary, the best timing for it, and the signs that indicate you might need one.

First off, What Exactly is a "Repair"?

A repair, or fill, is the process of partially replacing and adding extensions, typically done within about 2 to 3 weeks after the initial application.

It's a maintenance technique where the extensions from the previous session that are still in good condition are kept. Extensions that have grown out with the natural lash, fallen out due to the lash cycle, or become twisted or out of place are removed, and new extensions are applied to restore the look to its freshly applied state.

Extensions where the natural lash has grown out significantly from the root.
Gaps where extensions have fallen out due to the natural lash cycle.
Extensions that have changed direction or become unruly.

Especially for those new to eyelash extensions, it's ideal to have the condition checked during a repair session within 2-3 weeks of the initial application.

Why are Repairs Necessary? The 5 Key Benefits

Repairs serve several important purposes and offer significant benefits:

Maintain Safety and Beauty Consistently:
- Over time, the base of the extensions can lift, or their direction might change. Leaving them unattended can lead to poking sensations, itching, or even scratching the natural lashes or skin if you rub your eyes. Regular maintenance through repairs prevents these issues and keeps your extensions looking consistently beautiful.
- The longevity of extensions varies greatly depending on each client's lash condition and lifestyle. Repairs allow for optimal maintenance tailored to individual needs.
Reduce Cost Burden:
- Getting a repair is often more cost-effective than removing all extensions and getting a completely new set ("full set"). (Pricing structures vary by salon).
Shorten Appointment Time:
- Compared to a full set, a repair appointment takes less time. This makes it easier for busy individuals to maintain their extensions.
Avoid Removing Still-Good Extensions Unnecessarily:
- There's no need to remove extensions that are still in good condition, which also reduces potential stress on your natural lashes.
Allow for Minor Design Adjustments:
- Repairs make it easy to accommodate partial design changes, like wanting slightly longer extensions just on the outer corners or changing the curl type in a specific area.

【Important】Applying New Glue Over Old Glue is Prohibited! A proper repair does not involve simply applying new adhesive on top of old adhesive. This practice is forbidden due to hygiene and safety concerns.

What's the Best Timing for a Repair?

Generally, the recommended timing for a repair is 2 to 3 weeks after application.

However, this is just a guideline. Factors like:

A slower natural lash growth cycle.
Extensions that tend to last longer on you.
Lifestyle factors (e.g., not rubbing your eyes, not sleeping face-down).

In such cases, your extensions might remain in good condition for more than 3 weeks.

Conversely, after 3 weeks, usually a significant number of extensions will have fallen out, and the design will start to look sparse or uneven. For those who want to maintain a consistently full look, getting repairs every 2 to 3 weeks is ideal.