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A Korean collagen mask is usually one of three things: an overnight hydrogel mask made of low-molecular collagen that turns transparent as it dries (Biodance made this type famous; see our Biodance guide), a collagen-infused sheet mask worn for 20 minutes, or a collagen jelly cream. The overnight type goes on after serum, stays on for three hours to overnight, and is used one to three times a week.
"How do you use the collagen mask that turns clear?" has become one of the most common Korean skincare questions since the overnight hydrogel format went viral. The answer is simple, but the three products that all get called "collagen mask" work differently, so this guide separates them first and then explains the overnight one step by step.
At Daebak, a Seoul-based Korean culture and product company, product descriptions come from the brands. A note on the ingredient: collagen applied to the skin does not become the skin's own collagen; the molecule is too large. A 2020 review in the journal Antioxidants puts native collagen at around 300 kDa, far too big to pass the skin's outer layer, which is why brands use hydrolyzed or "low-molecular" collagen, broken into fragments of roughly 1 to 10 kDa; the same review describes hydrolyzed collagen as a cosmetic ingredient with good moisturizing properties. Brands use it as a humectant and film-former, and market these masks for hydration, bounce and a smoother look. That is what to expect.
The three types
| Overnight bio-collagen mask | Collagen sheet mask | Collagen jelly cream | |
|---|---|---|---|
| Form | Thick, translucent hydrogel sheet | Fabric or gel sheet soaked in essence | Bouncy cream in a jar |
| Time on skin | 3 hours to overnight | 15 to 20 minutes | Left on; daily moisturizer |
| What happens | Turns transparent as it dries | Essence absorbs; remove sheet | Absorbs like a cream |
| How often | 1 to 3 times a week | 1 to 3 times a week | Daily |
| Examples | Biodance Bio-Collagen Real Deep Mask, numbuzin No.2 Rose PDRN Overnight Collagen Mask | Mediheal Collagen Essential Mask, Round Lab Camellia Deep Collagen Gel Mask (hydrogel; follow its own timing) | medicube Collagen Jelly Cream |
Overnight bio-collagen masks
This is the one in the videos. The sheet is a dense hydrogel, usually in two pieces (upper and lower face), that feels cool and rubbery going on. Over a few hours the water in the gel is absorbed or evaporates and the sheet turns from milky to clear. That change is the product's signature and the reason it spread so fast on social media.
Biodance Bio-Collagen Real Deep Mask is the product that made the category famous and took second place for face masks at the Olive Young Awards 2025. Those awards are a purchase ranking rather than an editors' pick: CJ Olive Young says the 2025 list was drawn from 180 million customer purchases between July 2024 and June 2025, and the Korea JoongAng Daily has described the awards as the products that ranked first, second and third in sales in each category, reporting in 2022 that 82 percent of the winners came from small businesses. numbuzin No.2 Rose PDRN Overnight Collagen Mask adds PDRN, the ingredient we cover in What Is PDRN?. Round Lab Camellia Deep Collagen Firming Gel Mask is a camellia hydrogel from Round Lab; its pack gives its own wear time, which may be shorter than overnight.
Biodance Bio-Collagen Real Deep Mask. See details.
How to use an overnight collagen mask
- Cleanse and apply toner. Most brands suggest a serum or essence underneath as well; the gel sits on top and holds it in.
- Peel off the protective films from both sides of each piece. The mask is between two films; it is easy to throw away the wrong layer the first time.
- Place the upper piece first, lining it up with your eyes, then the lower piece around the mouth. Press it down so it sits flat.
- Leave it on for at least three hours. Overnight is the common choice; the mask stays put while you sleep better than a fabric sheet does.
- When it has turned transparent, peel it off. Pat in anything left on the skin, or rinse lightly if it feels tacky.
- Continue with cream, or skip it if your skin feels done.
Use it one to three times a week. If you are also using a sleeping mask or sheet masks, alternate nights rather than stacking.
numbuzin No.2 Rose PDRN Overnight Collagen Mask. See details.
Collagen sheet masks
A collagen sheet mask is a normal sheet mask whose essence lists collagen as a headline ingredient. Mediheal Collagen Essential Mask is the standard example and is used like any sheet mask: 15 to 20 minutes, then pat in the essence. The method is in How to Use a Korean Sheet Mask and How Often.
Collagen jelly creams
medicube Collagen Jelly Cream is a bouncy, jelly-textured moisturizer rather than a mask. It is the daily option for people who like the idea of collagen but do not want a weekly ritual.
medicube Collagen Jelly Cream. See details.
Who collagen masks suit
- Dry or dehydrated skin: the overnight gel is a strong hydration step. See Korean Skincare for Dry Skin.
- Before an event: the morning after an overnight mask is the usual reason people buy them.
- Oily skin: fine, but skip the cream underneath and use it less often.
- Sensitive skin: patch test; the gel is occlusive for many hours, which can bother reactive skin.
Brand products in our shop are shipped by the brands. If you would rather receive a set of Korean skincare chosen for you each season, the Daebak K-Beauty Box is a separate, curated option.
FAQ
Does the collagen mask really turn clear?
Yes. The hydrogel turns transparent as its water content drops, usually over three or more hours. It is a sign the mask has done its job, not a sign that collagen has "gone into" the skin.
Do you wash your face after a collagen mask?
Not necessarily. Peel off the mask and pat in what is left. If it feels tacky, rinse with lukewarm water. In the morning, go on with your usual routine and sunscreen.
Can I sleep in a collagen mask?
Yes, that is how the overnight type is designed to be used. It holds its position far better than a fabric sheet mask.
How often should I use a collagen mask?
One to three times a week for the overnight and sheet types. The jelly cream can be used daily.
Does a collagen mask replace collagen in the skin?
No. Topical collagen sits on the surface as a hydrating film. Brands market these masks for hydration and bounce, and that is a fair expectation.
Sources
- Collagen Hydrolysates for Skin Protection: Oral Administration and Topical Formulation (Antioxidants, 2020, via PubMed Central)
- CJ Olive Young announces the 2025 Olive Young Awards: 166 products in 40 categories (CJ Group Newsroom, November 2025, Korean)
- Olive Young holds annual beauty convention, highlights small businesses (Korea JoongAng Daily, December 2022)
