Oh K! Sheet Mask Watermelon Review

Oh K! Sheet Mask Watermelon
3.3
/ 10
Moisturizing
6.6 Humectancy icon Humectancy
0.0 Occlusivity icon Occlusivity
Ingredients

Oh K! Sheet Mask Watermelon Ingredients

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Full Ingredient List (INCI):

Water, Dipropylene Glycol, Glycerin, Alcohol, Butylene Glycol, Paeonia Suffruticosa Root Extract, Centella Asiatica Extract, 1,2-Hexanediol, PEG-60 Hydrogenated Castor Oil, Carbomer, Chamomilla Recutita (Matricaria) Flower Extract, Glyceryl Caprylate, Hydroxyethylcellulose, Xanthan Gum, Ethylhexylglycerin, Potassium Hydroxide, Sodium Hyaluronate, Citrullus Lanatus (Watermelon) Fruit Extract, Sodium Ascorbyl Phosphate, Disodium EDTA, Fragrance, Linalool
Review

Does Oh K! Sheet Mask Watermelon Work?

 
According to CreamScan's analysis of the ingredient list, here’s what Oh K! Sheet Mask Watermelon has to offer:
 
✅ Light moisturizing. It has a moisturizing rating of 3.3 out of 10.

  

Key Benefits of Oh K! Sheet Mask Watermelon

 
These are the key benefits you can expect from using Oh K! Sheet Mask Watermelon:
 

🔵 Lightweight Purely Humectant Moisturizer Well-Suited for Oily Skin

According to CreamScan analysis, Oh K! Sheet Mask Watermelon is lightly moisturizing, with a moisturizing rating of 3.3 out of 10.

Is it more humectant or occlusive? Purely humectant. It has zero occlusivity (we didn't find any occlusive ingredients on the ingredient list) and a high humectancy of 6.6 out of 10, primarily due to the high content of Glycerin (est. ≈4.0%) and Butylene Glycol (est. ≈2.0%).

This humectant-rich product, when used alone as a moisturizer, is well-suited for oily skin, providing moderate hydration in a lightweight, fast-absorbing formula without any occlusive ingredients.

📌 Certain studies suggest that humectants alone may not effectively moisturize the skin. If you use this product as your only moisturizer, we recommend following it with one that contains at least some occlusive ingredients.

💧 A Humectant Enhancement for Any Skincare Routine

But it’s not limited to oily skin - such a humectant enhancement will also positively contribute to the moisturizing efficacy of any skincare routine when used as a step before applying the main moisturizer. This type of formulation is typically used in serums, where a light, fast-absorbing texture is key.

Please refer to the Ratings section below for details of the moisturizing rating calculation.

📌 Please note that this is not a complete list of benefits. We are in the process of enhancing our model to incorporate anti-pigmentation, exfoliation and anti-acne ratings.

Things to Be Aware Of: Oh K! Sheet Mask Watermelon

 
CreamScan identified a few things to consider before adding Oh K! Sheet Mask Watermelon to your skincare routine:
 

⚠️ If It’s Your Only Moisturizer, It Needs to Be Paired with Some Occlusives

While humectants are highly effective at attracting water to the skin, studies (J. N. Kraft, C. W. Lynde) suggest they may not be efficient when used alone.

One major drawback of purely humectant moisturization is that the water attracted by humectants to the upper layers of the skin can evaporate completely into the environment through transepidermal water loss (TEWL). Adding occlusive ingredients helps seal this moisture into the skin and prevent further water loss.

If you’re using Oh K! Sheet Mask Watermelon as your only moisturizer, consider pairing it with one that contains at least some occlusive ingredients, such as oils, butters, or silicones. These work alongside humectants to create a protective barrier, locking in hydration and ensuring longer-lasting moisturization. The amount of occlusive needed depends on your skin type - the drier the skin, the more occlusives it requires.

If this product is used not as a standalone moisturizer but as part of your skincare routine, such as a toner or serum, it should be applied before your main moisturizer (unless it's a sunscreen), which will provide the necessary occlusivity on top of it.

⚠️ Questionable anti-wrinkle efficacy

If one of your main reasons for choosing Oh K! Sheet Mask Watermelon is its potential anti-aging effects, please note that, according to CreamScan analysis, it currently has a zero anti-wrinkle rating.

It contains Centella Asiatica Extract and Sodium Ascorbyl Phosphate, two ingredients often marketed as effective in reducing wrinkles. However, the studies supporting the anti-wrinkle claims of these ingredients provide insufficient evidence of efficacy according to CreamScan Research Evaluation Standards.

While this does not categorically rule out the possibility that these ingredients may reduce wrinkles, their efficacy is not supported by convincing, vehicle-controlled, double-blind clinical studies - at least none that were available to the CreamScan team at the time of publication.

Therefore, these ingredients do not generate the anti-wrinkle rating.

📌 Moisturizers, when used regularly, are proven to prevent wrinkle formation and even reduce existing wrinkles. Therefore, this product, like any other moisturizer, can deliver some anti-wrinkle effects through its moisturizing action.

Please refer to the Ratings section below for details of the anti-wrinkle rating calculation.

Pros & Cons of Oh K! Sheet Mask Watermelon

 
Here’s an overview of the pros and cons of Oh K! Sheet Mask Watermelon to help you decide if it’s the right choice for your skincare routine:
 

🟩 Pros:

✅ When used alone: Provides humectant-rich moisturizing well-suited for oily skin
✅ As part of a routine: A humectant moisturizing enhancement, beneficial for any skin type
✅ Lightweight texture
 

⭕ Cons: 

⚠️ Only if used as a standalone moisturizer - it needs to be paired with occlusives to seal in humectants
⚠️ Questionable anti-wrinkle efficacy
   

Summary: Oh K! Sheet Mask Watermelon

 
Based on the ingredient list analysis, CreamScan AI suggests that Oh K! Sheet Mask Watermelon
, when used alone, delivers lightweight, humectant-rich moisturizing that is well-suited for oily skin. As part of a moisturizing routine, it provides a humectant enhancement, beneficial for all skin types.
 
That said, there are some things about Oh K! Sheet Mask Watermelon worth noting.
 
Looking at its moisturizing profile, we found that it doesn’t contain any occlusive ingredients, potentially allowing the moisture attracted to the skin by humectants to evaporate. Therefore, if it’s used as the only moisturizer in a routine, it’s recommended to pair it with one that contains at least some occlusive ingredients, such as oils, butters, or silicones.
 
If one of your main reasons for considering Oh K! Sheet Mask Watermelon is its potential anti-aging effects, please note that, according to CreamScan analysis, its anti-wrinkle efficacy is questionable. None of the ingredients in this product provide substantial evidence of their anti-wrinkle efficacy according to CreamScan Research Evaluation Standards.
 
📌 Fact check. At CreamScan, we are committed to accuracy and fairness. If you spot any errors or something that doesn’t seem right, please click here to let us know. We regularly update the ingredient lists and monitor the latest research on ingredient efficacy to ensure that our information remains as complete and precise as possible. The information provided here is for informational purposes only and does not substitute professional advice. We do not guarantee the efficacy or safety of any product, as individual results may vary.

 

Ingredient Breakdown

Est. % Ingredient Origin Functions
75
6
4
3
2
1.5
1.3
1
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
0.3
Est. %
Water
Function:
Origin:
Dipropylene Glycol
Function:
Origin:
Glycerin
Function:
Origin:
Alcohol
Function:
Origin:
Butylene Glycol
Function:
Origin:
Paeonia Suffruticosa Root Extract
Function:
Origin:
Centella Asiatica Extract
Function:
Origin:
1,2-Hexanediol
Function:
Origin:
PEG-60 Hydrogenated Castor Oil
Function:
Origin:
Carbomer
Function:
Origin:
Chamomilla Recutita (Matricaria) Flower Extract
Function:
Origin:
Glyceryl Caprylate
Function:
Origin:
Hydroxyethylcellulose
Function:
Origin:
Xanthan Gum
Function:
Origin:
Ethylhexylglycerin
Function:
Origin:
Potassium Hydroxide
Function:
Origin:
Sodium Hyaluronate
Function:
Origin:
Citrullus Lanatus (Watermelon) Fruit Extract
Function:
Origin:
Sodium Ascorbyl Phosphate
Function:
Origin:
Disodium EDTA
Function:
Origin:
Fragrance
Function:
Origin:
Linalool
Function:
Origin:

Ratings

All humectants
6.6
4
2
0.3
0.3
Benchmark
10
All occlusives
0.0
None
Benchmark
20
Moisturizing rating
3.3
Ingredient Est. % Benchmark Raiting
Humectancy All humectants 6.6 10
6.6
4
2
0.3
0.3
Occlusivity All occlusives 0.0 20
0.0
None
Moisturizing rating
3.3
Ingredient Est. % Benchmark Humectancy
4
2
0.3
0.3
All humectants 6.6 10
6.6
All humectants
6.6
4
2
0.3
0.3
Benchmark
10
Ingredient Est. % Benchmark Occlusivity
None
All occlusives 0.0 20
0.0
All occlusives
0.0
None
Benchmark
20
Ingredient
Ingredient anti-wrinkle power
when present at, %
in this formula est. %
Rating
n/a
- 1.3 -
n/a
- 0.3 -
Total
0
Centella Asiatica Extract
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
1.3
Sodium Ascorbyl Phosphate
-
Ingredient anti-wrinkle power
n/a
when present at, %
-
in this formula, est. %
0.3
Anti-wrinkle rating
0
Ingredient Est. % Benchmark
Rich in Antioxidants
1.3
0.3
0.3
0.3
0.3
All antioxidants 2.5 3 No
All antioxidants
2.5
Centella Asiatica Extract
1.3
Chamomilla Recutita (Matricaria) Flower Extract
0.3
Sodium Hyaluronate
0.3
Citrullus Lanatus (Watermelon) Fruit Extract
0.3
Sodium Ascorbyl Phosphate
0.3
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
1.5
1.3
0.3
All soothing 3.1 5 No
All soothing
3.1
1.5
1.3
0.3
Benchmark
5

Ingredients explained

Water
Est. %75
Function
Origin
WaterThe most used ingredient in skincare. Its concentration defines the product texture: rich creams may have about 50% of water while a light jelly about 90%. Water doesn’t moisturize the skin by itself and is used in skincare as a solvent for other ingredients.
Dipropylene Glycol
Est. %6
Function
Origin
Dipropylene GlycolA clear, colorless liquid that has several uses. One of its main functions is as a solvent. Dipropylene glycol is also used to reduce the thickness of skincare products.
Glycerin
Est. %4
Function
Origin
Glycerin

The most popular moisturizing ingredient in the world. It is a powerful humectant – cheap yet very effective.

Alcohol
Est. %3
Function
Origin
AlcoholAn effective antimicrobial ingredient that kills bacteria, fungi, and even some viruses. It is also an excellent solvent and astringent. Alcohol helps to create lighter and less viscous products. It can, however, be dehydrating and skin-sensitizing.
Butylene Glycol
Est. %2
Function
Origin
Butylene Glycol

A clear, colorless liquid humectant that draws moisture to the skin. The humectancy of butylene glycol, owed to its two hydroxyl groups, is quite considerable, although not as powerful as glycerin, which contains three hydroxyl groups.

Paeonia Suffruticosa Root Extract
Est. %1.5
Function
Origin
Paeonia Suffruticosa Root ExtractA soothing extract obtained from a hybrid species of tree peony that contains various active compounds such as astringent tannins, terpenes, and paeonols.
Centella Asiatica Extract
Est. %1.3
Function
Origin
Centella Asiatica ExtractAn extract from the leaves of the Gotu kola. It is used in skincare for its antioxidant, wound healing, anti-inflammatory, and anti-aging properties. It increases the production of collagen and hyaluronic acid in the skin.
1,2-Hexanediol
Est. %1
Function
Origin
1,2-HexanediolA multi-functional formula helper. It is a well-studied preservtive against bacteria and can help pigments and fragrances disperse evenly in a formula.
PEG-60 Hydrogenated Castor Oil
Est. %0.3
Function
Origin
PEG-60 Hydrogenated Castor OilA white paste-like substance derived from castor oil that belongs to a group of ingredients called PEGs (polyethylene glycols). It acts as a perfume solubilizer that helps fragrance agents dissolve in water and as a cleansing agent.
Carbomer
Est. %0.3
Function
Origin
CarbomerA synthetic ingredient with the ability to gel water. When used in emulsions, such as lotions and creams, carbomer can also act as an emulsion stabilizer.
Chamomilla Recutita (Matricaria) Flower Extract
Est. %0.3
Function
Origin
Chamomilla Recutita (Matricaria) Flower ExtractDerived from German chamomile flowers, this extract is especially known for its anti-inflammatory and soothing benefits. It contains two soothing compounds called chamazulene and bisabolol, as well as antioxidant flavonoids.
Glyceryl Caprylate
Est. %0.3
Function
Origin
Glyceryl CaprylateA waxy solid derived from vegetable oils that has emollient and emulsifying properties. It is also known to boost the efficacy of organic acid preservatives by destabilizing the microbe's cell membrane.
Hydroxyethylcellulose
Est. %0.3
Function
Origin
HydroxyethylcelluloseA naturally-derived thickener that can form clear gel textures without the slimy feeling, unlike some other natural gel-formers.
Xanthan Gum
Est. %0.3
Function
Origin
Xanthan GumA natural multi-functional ingredient that originates from fermented sugars. Xanthan gum acts as a viscosity-building agent to thicken skincare products. It is also an excellent stabilizer and works well to hold other ingredients together.
Ethylhexylglycerin
Est. %0.3
Function
Origin
EthylhexylglycerinA preservative booster derived from glycerin. It is commonly paired with other preservatives to improve their efficacy. Ethylhexylglycerin is also a humectant due to its chemical base of glycerin.
Potassium Hydroxide
Est. %0.3
Function
Origin
Potassium HydroxideA very alkaline ingredient, meaning that it has a high pH. Potassium hydroxide is therefore useful in bringing a low pH in a cosmetic product up to a more neutral, skin-safe level.
Sodium Hyaluronate
Est. %0.3
Function
Origin
Sodium Hyaluronate

A sodium salt of famous hyaluronic acid. A potent humectant that hydrates the skin, supports collagen function, and fills out small wrinkles. Sodium hyaluronate also offers soothing and antioxidant properties.

Citrullus Lanatus (Watermelon) Fruit Extract
Est. %0.3
Function
Origin
Citrullus Lanatus (Watermelon) Fruit ExtractAn emollient extract from red watermelon fruit. Its pulp, seeds, and rinds are a source of beneficial compounds for the skin, and it has occlusive, emollient, and antioxidant properties.
Sodium Ascorbyl Phosphate
Est. %0.3
Function
Origin
Sodium Ascorbyl PhosphateThe most researched derivative of vitamin C. It boosts collagen synthesis, thereby improving skin structure and elasticity. SAP is effective in the treatment of inflamed acne lesions and has a weak but positive effect on pigmentation issues.
Disodium EDTA
Est. %0.3
Function
Origin
Disodium EDTAA synthetic chelator that helps to maintain the look and smell of a product by 'locking up' troublesome metal ions.
Fragrance
Est. %0.3
Function
Origin
FragranceUnder trade secret law, manufacturers have the right not to disclose what exactly went into the fragrance and use the unspecific word Fragrance or Parfum instead. Many fragrances are highly allergenic.
Linalool
Est. %0.3
Function
Origin
LinaloolA fragrant, volatile compound naturally present in many essential oils. It has a pleasant scent and is often used in skincare products as a fragrance. People with sensitive skin should try to avoid it, or at least do a patch test before using it.