How to Apply Eyelash Serum | Directions for Toplash Lash & Brow Serum

How to apply eyelash serum correctly

Apply eyelash serum once daily to clean, dry skin along the upper lash line. Use a thin layer close to the lash roots, let it dry, and avoid applying it over makeup or directly into the eye.

Clean your lashes before applying serum

Toplash serum should be used on clean, dry skin. Remove mascara, eyeliner, eyeshadow, eye cream, sunscreen residue, and any oil-based makeup remover from the eyelid area before application. A clean lash line helps the product sit where it is meant to work: close to the roots of the eyelashes.

After cleansing, gently pat the eyelids dry with a towel and wait until the skin is no longer damp. Applying lash serum over water, oil, or makeup can dilute the formula and make it easier for the product to move into the eye.

Where to apply eyelash serum

Apply a thin line of serum at the base of the upper eyelashes, close to the lash growth line. The product should not be painted over the entire eyelid and does not need to coat each lash from root to tip.

For the lower lash line, use extra care and avoid applying too much product. The original directions recommend placing the serum immediately under the lower lash growth line, but only a minimal amount is needed. If your eyes are sensitive, start with the upper lash line only and monitor comfort.

Why evening application works best

The easiest time to use eyelash serum is in the evening, after removing makeup and before going to bed. At night there is less friction from makeup, fewer environmental irritants, and more time for the product to remain undisturbed on the lash line.

Morning application can work if the serum is fully dry before skincare or makeup, but for most users the evening routine is simpler and more consistent.

Step-by-step eyelash serum directions

Before opening the bottle, keep it upright so the liquid does not spill. Remove the brush and lightly wipe excess serum on the edge of the bottle. The amount left on the applicator should be enough for a thin line across the lash roots.

1. Remove makeup and wash the eye area gently.
2. Dry the eyelids and eyelashes completely.
3. Remove contact lenses before application if you wear them.
4. Apply a thin strip along the upper lash line, close to the roots.
5. Let the serum dry before applying other skincare products or going to sleep.
6. Wash your face as usual in the morning.

Common application mistakes to avoid

More product does not mean faster results. Too much serum can make the formula spread beyond the lash line and may increase the chance of eye discomfort. A thin, controlled layer is better than a wet or dripping brush.

• Do not apply serum over mascara or eyeliner.
• Do not rub the product into the eye area.
• Do not use a large amount of serum on the brush.
• Do not share the applicator with another person.
• Do not use the product on irritated, infected, or injured skin.

What results to expect from regular use

With regular application, a lash serum routine is meant to support the appearance of stronger, fuller-looking lashes. The original page highlights that consistent use may help reduce the appearance of weak, brittle lashes and support a more defined lash line over time.

Visible results vary by person. The lash cycle is gradual, so users should not expect a dramatic change after one or two applications. A steady daily routine gives the best chance of seeing a visible cosmetic effect.

How often should you use eyelash serum?

Use eyelash serum once daily unless the product instructions say otherwise. Toplash can be used daily as part of a long-term lash care routine. After a stable visible result, some users take breaks, but lashes may gradually return toward their previous appearance when the routine is stopped.

Scientific References

The opinion of a cosmetologist

Branda M. Heim

Board-Certified Cosmetologist & Trichologist | Cosmetology and trichology review

For most users, the biggest application mistake is using too much serum. A lash serum should be applied as a controlled cosmetic step: clean skin, dry lash line, thin layer, and no rubbing into the eye area.

From a cosmetology perspective, nightly use is practical because it avoids makeup interference and helps users keep a consistent routine. Anyone with active irritation, eye infection, recent eye surgery, or persistent discomfort should pause use and consult a qualified medical professional.

References: NCBI FDA NIH ODS