Before and after picture showing lash growth after using lash serum

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Free Lash serum

Free Lash serum

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Application Guarantee

If you still can't apply your lashes confidently after our final 15-minute video consultation, we will refund you.

Lash Serum: Caring for What You Were Born With

Bring out the best in your natural lashes with our Lash Serum—perfect for use alongside your DIY lash extensions to nourish and strengthen the lashes underneath, or to use on its own for a natural lash boost. Designed to visibly lengthen, thicken, and add volume, this serum cares for what’s beneath your Underlash extensions or works wonders solo.

Infused with advanced polypeptides and nature’s most powerful botanicals, our Lash Serum provides essential nutrients to support lash health and growth. And with absolutely NO prostaglandin analogues, it’s gentle and safe for even the most sensitive eyes.

Oil-Free and DIY Lash-Friendly
Our oil-free formula is safe to use with DIY lash extensions, helping to keep both your natural lashes and extensions in peak condition. This serum promotes stronger, fuller lashes while protecting the beauty you’ve created with your extensions.

Give your natural lashes the care they deserve—our Lash Serum is here to support beautiful, healthy lashes, whether you’re wearing extensions or keeping it natural.

Start with clean, dry eyelids.
Apply the Lash Serum directly to the roots of your lashes once a day.
Wait 1-2 minutes for the serum to dry—and voila, you’re all set!

Wearing your Underlash lashes? No worries! Once the serum has dried, simply reapply the seal, and you’re good to go.

Purified Water, hyaluronic acid, ginseng extract, pumpkin seed extract, panthenol, myristoyl pentapeptide-17.

2 year shelf life. Store in a cool dry place.

Apply once a day before bed.

Shipping Policy

Free standard shipping in Australia on orders over $80.

Enjoy free express shipping on orders exceeding $250.

International worldwide shipping is complimentary for orders over $250 or available at a flat rate of $20 AUD.

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Returns & Exchanges

We know it can be overwhelming to choose your lash style online so for any reason you want to swap for another style we can do that on unused, unopened products.

All Items (Excluding Final Sale Items) In Their Unused Or Original Condition Are Eligible For A Return Or Exchange Within 30 Days Of Delivery. To Begin Your Return Or Exchange please email hello@underlash.com.au

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100% yes, queen! Our formula is oil-free, meaning it’s completely safe to use with your Underlash DIY lash extensions. Just let it dry fully, then reapply your seal and you’re good to go.

Once a day is all it takes. at night (or in the morning—whatever works for your routine). Consistency is key, Hun!

Everyone’s lashes are a little different, but most beauties see visible results in 4–6 weeks with daily use. Think fuller, longer, stronger lashes that are all yours.

Yep! Our gentle formula is specially designed for sensitive eyes and is free from nasties like prostaglandin analogues, so you can feel confident using it daily.

Absolutely! It’s perfect as a standalone treatment too, whether you're lash-free or between sets, it helps nourish, repair and grow your natural lashes.

No way. Our Lash Serum contains absolutely NO prostaglandin analogues - those are the ingredients in some other serums that can cause eye colour changes. We don’t mess around with that.

While our ingredients are super gentle and safe, customers who are pregnant do use our lash serum, we always recommend checking with your healthcare provider if you're pregnant or breastfeeding—just to be on the safe side, lovely.

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Enhance Your Natural Lashes

Safe & Natural Ingredients

A close up picture of a women wearing lash DIY lash extensions in the style "Mood lashes"

Pair with your Underlashes

Vegan & Cruelty Free

Your ultimate at-home glow-up.

Trusted by the experts

Laura Burbury

Founder, Beauty educator & Salon owner
@bylauraburbury
As a beauty salon owner with over 14 years of experience in the beauty industry, I am considered an expert in this field. With a deep passion for the industry, I have witnessed firsthand how eyelash extensions can enhance one's confidence and beauty. However, the damage that traditional salon lash extensions can cause to natural lashes is alarming. Based on my extensive knowledge and experience, I created Underlash™ - a safer alternative to traditional lash extensions. Our lashes have undergone rigorous testing and have been well-received by our clients. With Underlash™, you can achieve the beautiful, confident look you desire without compromising the health of your natural lashes.
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Sarah Jane

Lash extension educator & technician.
@beautyby_sarahjane
The first time I heard about Underlash I knew this was something I had to get my hands on and I instantly fell in love. As a beauty professional, it's important to offer a variety of services and products that cater to the unique needs of my clients. I believe Underlash is suited to everyone as they are incredibly easy to use and leave no damage to your natural lashes. Why spend so much time and money committing to lash extensions when you can use this product! It has 100% changed the lash industry for the better.
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Elise Wilson

Beauty Editor
@elisebeautyeditor
I'll admit I was skeptical about these lashes lasting for up to a week - but they did! I got 6 days out of mine. The Kit has everything you need in one, especially the very useful applicator tool to both apply and press them on with the special, long lasting glue. Instead of sitting on top of the lashes, they glue on underneath and look so natural. Defiantly worth the splurge!
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Nicola Johnson

Make up Artist
@sydney.makeup.artist
I was first introduced to Underlash while working on a shoot for the brand, I was amazed at how easy they were to apply and how natural they looked, I’ve never been a fan of eyelash extensions on my clients as they can look too fake. Underlash lashes enhance the clients eye’s without over powering, I always recommend underlash to my brides who want longer lasting lashes for their celebrations over extensions every time, there is no comparison. There is no damage to the natural lash either which is another reason i love them so much!
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