cecith
Waterlock First Serum - Deep Hydration Booster for a Dewy, Healthy Skin Barrier
Everyday Waterlock First Serum for a Dewy Skin Barrier. A lightweight foam-to-water first-step serum that floods skin with long-lasting moisture and helps rebuild a healthy, resilient barrier.
Why You'll Love It
- Locks in long-lasting moisture - Helps to seal in hydration for all-day dewy skin.
- Strengthens the skin barrier - Helps to build a healthy, resilient moisture barrier.
- Soothes & comforts the skin - Helps to calm dryness and relieve irritation.
One Serum, 3 Ways to Beat Dehydrated Skin
- Opens the water path - Mineral-rich formula guides moisture deep into skin.
- Fills every layer - 10X hyaluronic acid quenches skin from the inside out.
- Seals it all in - Jojoba & squalane hold hydration for all-day dewy skin.
Key Ingredients
- Aquaxyl - Draws in moisture and keeps skin hydrated.
- Acacia Peptide - Forms a moisture-locking layer to prevent dryness.
- Reju-Biome - Helps support a healthy skin microbiome.
Clinically Tested
113.4% agreed skin felt more hydrated after use, and agreed it helped relieve irritated skin.
*Human application test conducted by Korea Institute of Dermatological Sciences, Feb 27 - Mar 20, 2026. 22 women aged 37-57. Results may vary.
When To Apply
- Use after cleansing and toning, as the first step of your skincare routine.
- Apply morning and night to lock in hydration.
Always finish with sunscreen for daytime. Use as a daily morning & night skincare serum.
Full Ingredients List
Water, Glycerin, Butylene Glycol, Simmondsia Chinensis (Jojoba) Seed Oil, Pentylene Glycol, Methylpropanediol, Xylitylglucoside, Sodium Hyaluronate, Xylitol, Sea Salt, Sea Water, Hydrolyzed Hyaluronic Acid, Hyaluronic Acid, Squalane, Glycereth-26, Panthenol, 1,2-Hexanediol, Trehalose, C12-14 Alketh-12, Ethylhexylglycerin, Anhydroxylitol, Coco-Betaine, Aminomethyl Propanediol, Beta-Glucan, Tocopherol, Ceramide NP, Hydroxypropyltrimonium Hyaluronate, Sodium Acetylated Hyaluronate, Hydrolyzed Sodium Hyaluronate, Micrococcus Lysate, Sodium Hyaluronate Crosspolymer, Dimethylsilanol Hyaluronate, Potassium Hyaluronate, Sodium Hyaluronate Dimethylsilanol, Carbomer, Disodium EDTA
Couldn't load pickup availability
Details
- Foam-to-water first-step serum for a dewy, healthy skin barrier
- 150 ml / 5.07 fl. oz.
- Key ingredients: Aquaporin and Mineral Complex, 10X Hyaluronic Acid, Jojoba Oil, Squalane
- 3-step hydration: opens the water path, fills every layer, then seals it in
- Lightweight foam that melts into water, with no sticky or heavy finish
- For all skin types, including dry, dehydrated, oily-dehydrated and sensitive skin
- Clinically tested: 113.4% agreed skin felt more hydrated and that it helped relieve irritated skin
- Human application test conducted by Korea Institute of Dermatological Sciences, Feb 27 to Mar 20, 2026. 22 women aged 37 to 57. Results may vary.
- Made in Korea
Product care
- Use as the first step after cleansing and toning, morning and night.
- Apply within 3 seconds of washing, while skin is still damp, for the best absorption.
- Pump 1 to 2 times, press gently into the skin, then layer your usual essence, cream or oil.
- Always finish with sunscreen during the day.
- Patch test before first use if your skin is highly reactive.
- Keep the cap closed and store away from direct sunlight and extreme heat or cold.
Shipping & returns
- Free shipping on all orders over $100.
- United States: delivered in 2 to 5 business days.
- International: delivered in 7 to 10 business days.
- A tracking link is emailed as soon as your order ships.
- Duties and taxes may apply on international orders.
- If anything arrives damaged or incorrect, contact us and we will make it right. See our Refund Policy for full details.
- Safe Payment
- Free Express Shipping*
- Delivery 2-5 days
Discover Your Next Holy Grails
Clinically Tested Hydration — Feel It From Day One
Real results
What it did for their skin


★★★★★
I have been treated at a university hospital for a skin condition for years, so I have to be twice as careful as most people when I choose skincare. My skin is sensitive and dehydrated-oily, and even small triggers set it off, but this serum felt calm and comfortable from the first use. It hydrates without the greasy, heavy film I usually dread, more like a light moisture veil on the skin. No irritation, no allergic reaction, and I plan to keep buying it.
J. Park — sensitive, dehydrated-oily skin
Before
After 4 days★★★★★
I am extremely dry, and my barrier had completely collapsed: flaking, deep dehydration, redness and breakouts from the slightest thing. I will not pretend one product erased all of that, but I could feel water filling in from underneath, and it took far longer before the tightness came back. Re-applying went from about three times a night down to one. The redness right after cleansing dropped noticeably too.
Y. Park — very dry, compromised barrier
Before
After★★★★★
Acne, folliculitis, very oily skin, a broken barrier, redness and scarring. After a long course of antibiotics my face was the worst it had ever been. A little over a week with Waterlock and the dryness was gone and my barrier already felt stronger; my breakouts looked calmer too. It feels rich at first, but a few passes and it sinks straight in. Makeup sits beautifully over it, and after a month the small bumps on my forehead have really gone down.
M. Kim — acne-prone, very oily skin
Individual experiences shared by verified customers. Results may vary.