What it is: A nurturing eyelash primer that maximizes mascara results for major lash lift and the appearance of longer, thicker, and more volumized lashes.
Ingredient Callouts: Free of sulfates SLS and SLES, formaldehydes, formaldehyde-releasing agents, phthalates, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, triclosan, and triclocarban, and contains less than one percent of synthetic fragrances.
What Else You Need to Know: This iconic lash primer evenly separates and coats eyelashes with a nourishing, conditioning formula to maximize the results of your mascara. Infused with micro-fibers and vitamin E, this eyelash primer helps improve natural lash length, thickness, and curl over time for a false lash effect.
This product is an Allure Best of Beauty award winner.
Clinical Results: In a consumer test with a panel of 103 women using CILS BOOSTER and their regular mascara: - 93% saw more length - 92% saw more volume - 85% saw more curl
A really nice eyelash primer and worth the price 
This is a really great product if you need a boost in volume and length when you wear mascara. I have very blonde eyelashes that are of average length and this product allows me to use pretty much any mascara (although I prefer Longcombe’s idol) . It gives a great depth and length and is easy to remove with makeup remover. Highly recommend(although I prefer Longcombe‘s idol)
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JoJoinPHL
Verified Purchase
1mo ago
Formula change?
Did the formula change? This used to be my go to for lengthening my lashes. Now it doesn't make them look any longer or thicker, and it seems to stay stickier longer.
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Emme19
Blue eyes, Fair skin tone, Dry skin
Verified Purchase
2mos ago
Recommended
Must-have!
When I use the cils booster primer before my Lancôme mascara, I often get asked if I have lash extensions. Nope, no extensions, no falsies, just my own lashes impressively enhanced by this product!
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pascale
Green eyes, Light Medium skin tone, Combination skin
2mos ago
Recommended
Buy it!
I’ve used this mascara base for years and it makes a huge difference, especially if you’re used to long, full lashes when you’re younger. So as you get older (late 30s…) you can achieve the same looking younger lashes with this base added. It’s truly a game changer. I’ve gifted it to a few friends who now also use it religiously. Highly recommend:)
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emi44444
Green eyes, Fair skin tone, Combination skin
Verified Purchase
2mos ago
Recommended
Purchased on repeat & do not wear mascara without it.
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ithia724
Verified Purchase
2mos ago
Recommended
10/10 flowers given
This product is acc amazing. I got this as a sample for months never tried it until I did n it was a GAME CHANGER. It holds curl, lasts long, no mess/ flaking. Have sensitive dry eyes n doesn’t hurt. I don’t even use a lash curler n it looks like a half lash with curled lash.
The pic was taken AFTER the gym!!
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unknown73637373
Brown eyes, Fair skin tone, Dry skin
3mos ago
Recommended
Amazing! My mascara used to come off on my lids through out the day and this has helped it stay on. It works so well! I got a sample through my points and will definitely be buying the full size!
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Renata27
Hazel eyes, Fair skin tone, Dry skin
Verified Purchase
3mos ago
Recommended
Works
I've purchased this product for years after getting a sample of it and I like it. It has healthy ingredients for your lashes and makes them just a bit thicker without making them look clumpy and spidery. Lasts a long time in the tube without drying out and works with any mascara I've tried. I picked this image because I put the lash base on right before the mascara then switched eyes and some.i was interrupted mid-application I forgot to apply the base to the left eye in the picture. The right side looks just a tiny bit fuller by the base and I was not trying to do anything special or extra precise, this was just a normal day. I will continue to purchase.
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LADavid
Blue eyes, Fair skin tone, Combination skin
Verified Purchase
3mos ago
Recommended
eyelash game changer
This has been a staple in my routine since college, and I still haven’t found anything that replaces it. Cils Booster XL coats the lashes beautifully, adds structure, and gives an instant lift and extra “oomph” before mascara.
I use it on top of a lash serum, and it really enhances the appearance of length and fullness. Even on no‑makeup days, this makes lashes look more polished.
Reliable, effective, and one of those products I always repurchase.
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michellesknotes
Brown eyes, Fair skin tone, Dry skin
Verified Purchase
3mos ago
Recommended
loveee her
best lash primer sephora has, (in my opinion)!! works great with both regular mascara and tubing mascara. gives you that extra length and volume you’re looking for.
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Anonymous
What it is: A nurturing eyelash primer that maximizes mascara results for major lash lift and the appearance of longer, thicker, and more volumized lashes.
Ingredient Callouts: Free of sulfates SLS and SLES, formaldehydes, formaldehyde-releasing agents, phthalates, mineral oil, retinyl palmitate, oxybenzone, coal tar, hydroquinone, triclosan, and triclocarban, and contains less than one percent of synthetic fragrances.
What Else You Need to Know: This iconic lash primer evenly separates and coats eyelashes with a nourishing, conditioning formula to maximize the results of your mascara. Infused with micro-fibers and vitamin E, this eyelash primer helps improve natural lash length, thickness, and curl over time for a false lash effect.
This product is an Allure Best of Beauty award winner.
Clinical Results: In a consumer test with a panel of 103 women using CILS BOOSTER and their regular mascara: - 93% saw more length - 92% saw more volume - 85% saw more curl
Suggested Usage: -Apply the Cils Booster XL as a mascara base from root to tip. -Immediately Apply mascara over the wet lash primer. -Do not wait until it is dried before coating each lash with mascara for a perfectly-smooth, clump-free application and lash look. -Tip: May be applied at night as an eyelash conditioner.
Summary
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4.4★
5128 Reviews*
88%
Recommended
*Some reviewers received something in exchange for a review (free product, payment, sweeps entry).
