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Product Comparison

Here's our complete breakdown comparing the ingredients, attributes, and more of Olaplex No.8 Bond Intense Moisture Mask versus Ouai Leave in Conditioner .

Last updated on October 25, 2023. Published on August 27, 2022

Overview

What they are

These products are both cruelty-free and reef safe . They have a total of 25 ingredients in common

Cool Features

They both contain hyaluronic acid and Vitamin E

Suited For

They're both likely to be good for anti aging, dry skin, brightening skin and sensitive skin

Free From

They both do not contain any parabens or sulfates

What's Inside

They both contain common allergens, fragrances, oils and silicones

We independently verify ingredients, and our claims are backed by peer-reviewed research. Spot a product that need an update? Let us know.

Hair Mask American Brand United States
Leave-in Conditioner American Brand United States

Hair Mask

Hair masks provide intense nourishment to your hair and usually need to be washed out. They can be used to treat specific hair conditions.

Leave-in Conditioner

A type of no-rinse conditioner that hydrates the hair.

Price

Shop

Buy No.8 Bond Intense Moisture Mask

Starts at $6.99
Shop

Buy Leave in Conditioner

Starts at $30.00

Ingredient Info

Click any item below to learn more and view relevant ingredients.
alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free
alcohol-free
silicon-free
fragrance-free
sulfate-free
paraben-free
oil-free
fungal-acne safe
reef-safe
eu-allergen-free
vegan
cruelty-free

At a glance

Click on any of the items below to learn more

Notable Ingredients

Vitamin E
Ceramides (2)
Hyaluronic Acid

Benefits

Hydrating (5)
Redness Reducing (2)
Reduces Irritation (3)
Anti-Aging (2)
Brightening (2)

Concerns

Drying
May Worsen Oily Skin
Irritating
Rosacea (2)
Eczema (3)

Notable Ingredients

Vitamin C
Vitamin E
Hyaluronic Acid

Benefits

Hydrating (2)
Redness Reducing
Reduces Irritation (2)
Skin Texture
Anti-Aging
Dark Spots
Scar Healing
Brightening (2)

Concerns

May Worsen Oily Skin (2)
Acne Trigger (2)
Rosacea
Eczema
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Ingredients Compared

Ingredients that are highlighted in purple are present in both products.

Ingredients Side-by-side

Ingredients that are highlighted in purple are present in both products.

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Ingredients Explained

These ingredients are found in both products.

Ingredients higher up in an ingredient list are typically present in a larger amount.

1
What it does: Skin Conditioning, Solvent
Community Rating: Loved

Water. It's the most common cosmetic ingredient of all. You'll usually see it at the top of ingredient lists, meaning that it makes up the largest part of the product.

So why is it so popular? Water most often acts as a solvent - this means that it helps dissolve other ingredients into the formulation.

You'll also recognize water as that liquid we all need to stay alive. Talk about multi-purpose! If you see this, drink a glass of water. Stay hydrated!

Learn more about Water

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 1.

Ouai Leave in Conditioner contains this as ingredient number 1.

2
What it does: Humectant, Skin Conditioning, Skin Protecting, Solvent
Community Rating: Loved

Glycerin is already naturally found in your skin. It helps moisturize and protect your skin.

A study from 2016 found glycerin to be more effective as a humectant than AHAs and hyaluronic acid.

As a humectant, it helps the skin stay hydrated by pulling moisture to your skin. The low molecular weight of glycerin allows it to pull moisture into the deeper layers of your skin.

Hydrated skin improves your skin barrier; Your skin barrier helps protect against irritants and bacteria.

Glycerin has also been found to have antimicrobial and antiviral properties. Due to these properties, glycerin is often used in wound and burn treatments.

In cosmetics, glycerin is usually derived from plants such as soybean or palm. However, it can also be sourced from animals, such as tallow or animal fat.

This ingredient is organic, colorless, odorless, and non-toxic.

Glycerin is the name for this ingredient in American English. British English uses Glycerol/Glycerine.

Learn more about Glycerin

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 5.

Ouai Leave in Conditioner contains this as ingredient number 29.

3
What it does: Preservative
Community Rating: Liked

This ingredient is a preservative and often used for it's anti-static properties. You'll most likely see this ingredient in hair conditioners.

It does not cause irritation or sensitization in leave-on products at 1-5%.

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 8.

Ouai Leave in Conditioner contains this as ingredient number 32.

4
What it does: Humectant, Skin Conditioning
Community Rating: Loved

Sodium Hyaluronate is hyaluronic acid's salt form. It is commonly derived from the sodium salt of hyaluronic acid.

Like hyaluronic acid, it is great at holding water and acts as a humectant. This makes it a great skin hydrating ingredient.

Sodium Hyaluronate is naturally occurring in our bodies and is mostly found in eye fluid and joints.

These are some other common types of Hyaluronic Acid:

Learn more about Sodium Hyaluronate

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 18.

Ouai Leave in Conditioner contains this as ingredient number 25.

5
What it does: Humectant, Skin Conditioning
Community Rating: Loved

Sodium PCA is the sodium salt of pyroglutamic acid and is naturally occurring on human skin.

The PCA stands for pyrrolidone carboxylic acid, a natural amino acid derivative.

Sodium PCA is a has conditioning, anti-inflammatory, and humectant properties. Humectants help hydrate your skin by drawing moisture from the air. This helps keep your skin moisturized.

Learn more about Sodium PCA

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 19.

Ouai Leave in Conditioner contains this as ingredient number 42.

6
What it does: Masking, Skin Conditioning
Community Rating: Mixed

Arginine is an amino acid that is important for human development. Your body uses is it to produce hair keratin and skin collagen.

As a cosmetic ingredient, Arginine has antioxidant properties and can also help repair damaged skin. This ingredient is derived either synthetically or from animals.

Arginine isn't fungal acne safe when used in the presence of other lipids (fats, fatty acids, oils, esters, etc). Oils and fats occur naturally within the skin, so take caution when using Arginine if you're prone to fungal acne.

Learn more about Arginine

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 21.

Ouai Leave in Conditioner contains this as ingredient number 15.

7
What it does: Skin Conditioning
Community Rating: Loved

Panthenol (also referred to as pro-vitamin B5) is a common ingredient that helps hydrate and soothe the skin.

lt is a humectant, meaning that it helps the skin attract and retain moisture.

Another benefit is the anti-inflammatory abilities. This means that it's great for sensitive, irritation-prone skin.

Once oxidized, panthenol converts to pantothenic acid. Panthothenic acid is found in all living cells.

Learn more about Panthenol

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 23.

Ouai Leave in Conditioner contains this as ingredient number 13.

8
What it does: Buffering, Skin Conditioning
Community Rating: Liked

Glycine is an amino acid that helps build proteins. It is already present in our skin as our bodies produce them naturally.

Glycine helps keep skin hydrated and reduce signs of aging. Amino acids help transport moisture throughout our skin; glycine already plays a role in helping keep our skin moisturized.

As collagen is made up of glycine and other amino acids, it is believed Glycine may help our skin produce more collagen. Collagen helps keep skin plump and firm.

Learn more about Glycine

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 26.

Ouai Leave in Conditioner contains this as ingredient number 18.

9
What it does: Masking, Skin Conditioning
Community Rating: Loved

Alanine is an amino acid and is already found in the human body.

Alanine has antioxidant properties and can help with anti-aging.

Alanine is used by fibrous proteins such as collagen, elastin, and keratin. These three help make a strong skin barrier. Having a healthy skin barrier leads to more plump and youthful skin.

Learn more about Alanine

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 27.

Ouai Leave in Conditioner contains this as ingredient number 19.

10
What it does: Masking, Skin Conditioning
Community Rating: Loved

Serine is an amino acid naturally found in our body. Our bodies use amino acids to create protein.

Amino-acids help give keep our skin hydrated. They play an important role in the skin barrier, which keeps the skin plump and firm.

Serine is a non-essential amino acid, meaning we don't need to obtain it from eating foods.

Learn more about Serine

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 28.

Ouai Leave in Conditioner contains this as ingredient number 20.

11
What it does: Masking, Skin Conditioning
Community Rating: Loved

We don't have a description for Valine.

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 29.

Ouai Leave in Conditioner contains this as ingredient number 21.

12
What it does: Skin Conditioning
Community Rating: Loved

We don't have a description for Isoleucine.

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 30.

Ouai Leave in Conditioner contains this as ingredient number 22.

13
What it does: Skin Conditioning
Community Rating: Loved

Proline is an amino-acid. It helps moisturize the skin and plays an important role in creating proteins.

Proline is one of the building blocks for producing collagen. As we age, our bodies produce less collagen. Collagen helps the skin look plump and firm.

In medicine, proline is used as an osmoprotectant. This means it helps prevent oxidative degradation in other drugs.

Our bodies are able to produce proline naturally, but certain conditions may inhibit this production. In that case, proline can be obtained from eating egg whites, soy protein, dairy products, asparagus, mushrooms, and seaweed.

Learn more about Proline

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 31.

Ouai Leave in Conditioner contains this as ingredient number 23.

14
What it does:
Community Rating: Loved

Threonine is an amino-acid. It helps hydrate the skin and has antioxidant benefits.

Threonine is vital for creating collagen and elastin. Collagen and elastin support youthful and firm skin. Our bodies decrease collagen production naturally with age.

Humans are not able to create threonine and must get it through eating foods such as fish, lentils, poultry, sesame seeds, and more.

Learn more about Threonine

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 32.

Ouai Leave in Conditioner contains this as ingredient number 24.

15
What it does: Skin Conditioning
Community Rating: Liked

This ingredient is derived from guar gum.

It is a conditioning ingredient, meaning it helps soften skin and hair.

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 33.

Ouai Leave in Conditioner contains this as ingredient number 39.

16
What it does: Humectant, Skin Conditioning
Community Rating: Loved

We don't have a description for Histidine.

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 34.

Ouai Leave in Conditioner contains this as ingredient number 26.

17
What it does: Masking, Skin Conditioning
Community Rating: Loved

Phenylalanine is an amino acid. It is a skin soothing and hydrating ingredient. Amino acids play a crucial role in wound healing and skin hydration.

Phenylalanine is also used to help even out skin tone due to its ability to disrupt the melanin production process.

Two structures of phenylalanine exist: L-phenylalanine and D-phenylalanine. L-phenylalanine is essential, this means our bodies cannot produce it naturally and we must get it from foods. Our bodies convert D-phenylalanine to neurotransmitters, and D-phenylalanine is found in our bodies naturally.

Some foods that contain L-phenylalanine include eggs, soybeans, beef, milk.

Learn more about Phenylalanine

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 36.

Ouai Leave in Conditioner contains this as ingredient number 44.

18
What it does: Masking, Skin Conditioning
Community Rating: Liked

Aspartic Acid is an amino acid that our bodies produce naturally. It is an antioxidant.

Our body uses Aspartic Acid to help build collagen and elastin. It also plays a role in hydrating skin.

Antioxidants help mitigate damage from free-radical molecules. These are molecules that originate from external sources such as pollution, cigarette smoke, or the sun.

Learn more about Aspartic Acid

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 37.

Ouai Leave in Conditioner contains this as ingredient number 16.

19
What it does: Humectant, Moisturising
Community Rating: Loved

PCA is derived from amino acids and is naturally found in our skin's barrier.

As a humectant, PCA helps draw and hold moisture to the skin. Studies show it is effective at helping the skin stay hydrated long-term.

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 38.

Ouai Leave in Conditioner contains this as ingredient number 17.

20
What it does: Buffering, Masking
Community Rating: Disliked

Citric Acid is an AHA derived from citrus fruits (think oranges, lemons, and limes!).

If you spot Citric Acid near the end of an ingredient list, it's likely there as a pH adjuster rather than an active ingredient.

As an AHA, Citric Acid removes the top layer of skin cells from the newer layer of skin underneath. This helps skin to remove dark spots and look more even.

Read more about some other popular AHA's here:

Learn more about Citric Acid

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 40.

Ouai Leave in Conditioner contains this as ingredient number 46.

21
What it does: Buffering, Humectant
Community Rating: Liked

Sodium Lactate is the sodium salt of lactic acid, an AHA. It is a humectant and used to adjust the pH of a product.

Sodium Lactate is part of our skin's NMF, or natural moisturizing factor. Our NMF is essential for the hydration of our top skin layers and plasticity of skin.

It also influences our skin's natural acid mantle and pH, which protects our skin from harmful bacteria.

Our NMF is formed from amino acids, lactic acid, sugars, minerals, peptides, and electrolytes. As we age, our NMF naturally depletes. Other sources of NMF depletion include harsh and drying ingredients such as denatured alcohol. Sodium lactate can help replenish our NMF, leading to more hydrated and plump skin.

High percentages of Sodium Lactate can have an exfoliating effect.

Sodium Lactate is produced from fermented sugar.

Learn more about Sodium Lactate

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 41.

Ouai Leave in Conditioner contains this as ingredient number 43.

22
What it does: Preservative
Community Rating: Very Disliked

Phenoxyethanol is a preservative that has germicide, antimicrobial, and aromatic properties. Studies show that phenoxyethanol can prevent germ and microbial growth. By itself, it has a scent that is similar to that of a rose.

It's often used in formulations along with Caprylyl Glycol to preserve the shelf life of products.

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 44.

Ouai Leave in Conditioner contains this as ingredient number 6.

23
What it does: Masking, Perfuming
Community Rating: Very Disliked

Parfum is a catch-all term for an ingredient or more that is used to give aroma to products. Parfum, or fragrance, can be a blend of hundreds of chemicals or plant oils. This means every product with "fragrance" or "Parfum" in the ingredients list is a different mixture.

In the US, the alternative name for parfum is 'fragrance'. The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term.

For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance. One example is Calendula flower extract. Essential oil ingredients still impart a scent or 'fragrance'.

Depending on the blend, it can cause allergies and sensitivities on the skin. Some ingredients that are known EU allergens include linalool and citronellol.

Products use parfum often to give products a scent or cover up smells of different ingredients.

The bottom line is: not all fragrances/parfum/ingredients are created equally. If you are worried about fragrances, we recommend taking a closer look at an ingredient. And of course, we always recommend speaking with a professional.

Learn more about Parfum

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 50.

Ouai Leave in Conditioner contains this as ingredient number 5.

24
What it does: Perfuming

Citral is a fragrance and used to add a lemon-like scent to products. It is both naturally found in plants and created synthetically. In plants, it is commonly occurring in lemon myrtle, lemongrass, lemon tea-tree, lemon verbena, and other citruses.

The EU mandates Citral be listed separately as a fragrance. It is a known allergen and may cause contact dermatitis. Citral can also used as a masking ingredient.

The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.

The term 'citral' is a collective term for two geometric isomers: geranial/Citral A and neral/Citral B.

Learn more about Citral

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 51.

Ouai Leave in Conditioner contains this as ingredient number 51.

25
What it does: Perfuming, Solvent
Community Rating: Very Disliked

Limonene is a fragrance that adds scent and taste to a formulation.

It's found in the peel oil of citrus fruits and other plants such as lavender and eucalyptus. The scent of limonene is generally described as "sweet citrus".

Limonene acts as an antioxidant, meaning it helps neutralize free radicals.

When exposed to air, oxidized limonene may sensitize the skin. Because of this, limonene is often avoided by people with sensitive skin.

The term 'fragrance' is not regulated in many countries. In many cases, it is up to the brand to define this term. For instance, many brands choose to label themselves as "fragrance-free" because they are not using synthetic fragrances. However, their products may still contain ingredients such as essential oils that are considered a fragrance.

Learn more about Limonene

Olaplex No.8 Bond Intense Moisture Mask contains this as ingredient number 53.

Ouai Leave in Conditioner contains this as ingredient number 54.

Here's what our community thinks of the ingredients in these two products.

49% are loved or liked
8% have mixed ratings
30% are disliked or very disliked
13% have no rating yet
43% are loved or liked
7% have mixed ratings
26% are disliked or very disliked
24% have no rating yet

Usage

Here's some more info on how this product is used by our community.

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Reviews

Here's what our community thinks

Olaplex No.8 Bond Intense Moisture Mask 53 ingredients

4.0 /5
from 2 ratings

Ouai Leave in Conditioner 54 ingredients

4.0 /5
from 1 rating

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