K18 HeatBounce Leave-In Conditioner Heat Protectant, Size: 4 FL Oz, None

Common questions

Is K18 HeatBounce Leave-In Conditioner Heat Protectant, Size: 4 FL Oz, None healthy?

K18 HeatBounce Leave-In Conditioner Heat Protectant, Size: 4 FL Oz, None scores 70/100 on Scout's independent analysis of ingredients, additives, and lab results — a fair-to-good score — solid, with tradeoffs. This leave-in conditioner contains beneficial natural extracts like sunflower seed oil, rice bran extract, and rosemary leaf extract, which provide antioxidant and moisturizing benefits.

Which ingredients drive K18 HeatBounce Leave-In Conditioner Heat Protectant, Size: 4 FL Oz, None's score?

In Scout's ingredient-by-ingredient analysis, Helianthus Annus (Sunflower) Seed Oil, Oryza Sativa (Rice) Bran Extract, Helianthus Annuus (Sunflower) Extract count in its favor; Sodium Benzoate, Potassium Sorbate, Benzyl Alcohol are flagged as ingredients of concern. The full breakdown, with why each one matters, is in the Key ingredients section on this page.

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K18 HeatBounce Leave-In Conditioner Heat Protectant, Size: 4 FL Oz, None

K18
70 Good

Analysis updated August 2026 · How Scout scores

$48.00 · 4 fl oz · $30.00 / fluid ounce
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At a glance

Beneficial ingredients 6
Harmful ingredients 8
Owned by Unilever
Category Other Makeup
Summary

This leave-in conditioner contains beneficial natural extracts like sunflower seed oil, rice bran extract, and rosemary leaf extract, which provide antioxidant and moisturizing benefits. However, the presence of fragrance, which can be a potential irritant, and the inclusion of processed ingredients limit its overall safety profile. The product's processing level and the use of synthetic components prevent it from achieving a higher score.

Key ingredients 43

Helianthus Annus (Sunflower) Seed Oil
Very Good

Sunflower seed oil is a natural oil rich in fatty acids and vitamin E. It provides excellent emollient properties and helps to nourish and moisturize the skin. It is well-tolerated and beneficial for most skin types.

Risks

There are minimal risks, though it may cause mild irritation in very sensitive individuals.

Benefits

It nourishes and moisturizes the skin, providing essential fatty acids.

See more about Helianthus Annus (Sunflower) Seed Oil →
Tocopherol
Very Good

Tocopherol, or vitamin E, is a powerful antioxidant that helps protect the skin from free radical damage. It also has moisturizing properties and supports skin health. It is well-tolerated and beneficial for most skin types.

Risks

There are minimal risks associated with tocopherol.

Benefits

It provides antioxidant protection and moisturizes the skin.

See more about Tocopherol →
Oryza Sativa (Rice) Bran Extract
Good

Rice bran extract is rich in antioxidants and nutrients. It helps to protect the skin from environmental stressors and improve skin texture. It is generally considered safe and beneficial for skin health.

Risks

There are minimal risks associated with rice bran extract.

Benefits

It provides antioxidant protection and improves skin texture.

See more about Oryza Sativa (Rice) Bran Extract →
Helianthus Annuus (Sunflower) Extract
Good

Sunflower extract is known for its antioxidant properties. It helps to protect the skin from oxidative stress and improve overall skin health. It is considered safe and beneficial for most skin types.

Risks

There are minimal risks, though it may cause mild irritation in very sensitive individuals.

Benefits

It provides antioxidant protection and supports skin health.

See more about Helianthus Annuus (Sunflower) Extract →
Rosmarinus Officinalis (Rosemary) Leaf Extract
Good

Rosemary leaf extract is a natural antioxidant and anti-inflammatory agent. It helps to protect the skin from damage and reduce inflammation. It is generally considered safe and beneficial for skin health.

Risks

There are minimal risks, though it may cause mild irritation in very sensitive individuals.

Benefits

It provides antioxidant protection and reduces inflammation.

See more about Rosmarinus Officinalis (Rosemary) Leaf Extract →
Gluconolactone
Good

Beneficial ingredient — whole-food or functional value in this product class.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It exfoliates and moisturizes the skin, improving texture.

See more about Gluconolactone →
Water (Aqua) (Eau)
Neutral

Water is a common solvent used in cosmetic formulations. It helps dissolve other ingredients and provides a base for the product. It does not have any direct benefits or risks.

Risks

There are no known risks associated with water in cosmetic products.

Benefits

Water helps in the application and absorption of the product.

See more about Water (Aqua) (Eau) →
Cellulose Gum
Neutral

Cellulose gum is used as a thickening agent in cosmetics. It helps to stabilize the formulation and improve texture. It is generally considered safe and non-irritating.

Risks

There are minimal risks associated with cellulose gum, though it may cause mild irritation in sensitive individuals.

Benefits

It enhances the texture and stability of the product.

See more about Cellulose Gum →
Isopentyldiol
Neutral

Isopentyldiol is a humectant that helps retain moisture in the skin. It is used to improve the feel of the product. It is generally considered safe for use in cosmetics.

Risks

There are no significant risks associated with isopentyldiol.

Benefits

It helps to keep the skin hydrated by retaining moisture.

Propanediol
Neutral

Propanediol is a solvent and humectant used in cosmetics. It helps to improve the texture and moisture retention of the product. It is considered safe for use in cosmetics.

Risks

Propanediol may cause mild irritation in very sensitive skin types.

Benefits

It enhances the product's texture and helps retain moisture.

See more about Propanediol →
Cetearyl Alcohol
Neutral

Cetearyl alcohol is a fatty alcohol used as an emollient and thickener. It helps to soften and smooth the skin. It is generally considered safe and non-irritating.

Risks

There are minimal risks associated with cetearyl alcohol.

Benefits

It provides a smooth texture and helps to soften the skin.

See more about Cetearyl Alcohol →
Isopropyl Palmitate
Neutral

Isopropyl palmitate is an emollient that helps to improve the texture of the product. It provides a smooth application and enhances skin feel. It is generally considered safe for use in cosmetics.

Risks

It may cause mild irritation or acne in some individuals with sensitive skin.

Benefits

It enhances the texture and application of the product.

See more about Isopropyl Palmitate →
C13-15 Alkane
Neutral

C13-15 alkane is used as an emollient and solvent in cosmetics. It helps to improve the spreadability of the product. It is considered safe for use in cosmetics.

Risks

There are no significant risks associated with C13-15 alkane.

Benefits

It enhances the spreadability and texture of the product.

sh-Oligopeptide-78 s-Fruit Fly Oligopeptide-1
Neutral

This ingredient is a peptide used for its potential skin conditioning properties. It may help to improve skin texture and appearance. Its safety profile is generally considered acceptable in cosmetics.

Risks

There is limited data on the long-term effects of this peptide.

Benefits

It may improve skin texture and appearance.

Laurdimonium Hydroxypropyl Hydrolyzed Barley Protein
Neutral

This ingredient is used for its conditioning properties in hair care products. It helps to improve hair texture and manageability. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks associated with this ingredient.

Benefits

It enhances hair texture and manageability.

Behentrimonium Chloride
Neutral

Behentrimonium chloride is a conditioning agent used in hair care products. It helps to improve hair texture and manageability. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks associated with behentrimonium chloride.

Benefits

It enhances hair texture and manageability.

See more about Behentrimonium Chloride →
Brassicatrimonium Chloride
Neutral

Brassicatrimonium chloride is used as a conditioning agent in hair care products. It helps to improve hair texture and manageability. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks associated with brassicatrimonium chloride.

Benefits

It enhances hair texture and manageability.

Arginine
Neutral

Arginine is an amino acid used for its moisturizing and conditioning properties. It helps to improve skin hydration and texture. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks associated with arginine.

Benefits

It moisturizes and conditions the skin, improving texture.

See more about Arginine →
Coco-Glucoside
Neutral

Coco-glucoside is a mild surfactant used for its cleansing and foaming properties. It helps to improve the texture and application of the product. It is generally considered safe and non-irritating.

Risks

There are minimal risks associated with coco-glucoside.

Benefits

It provides mild cleansing and improves product texture.

See more about Coco-Glucoside →
Lactic Acid
Neutral

Lactic acid is an alpha hydroxy acid used for its exfoliating and moisturizing properties. It helps to improve skin texture and hydration. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It exfoliates and moisturizes the skin, improving texture.

See more about Lactic Acid →
Cellulose
Neutral

Cellulose is used as a thickening agent in cosmetics. It helps to stabilize the formulation and improve texture. It is generally considered safe and non-irritating.

Risks

There are minimal risks associated with cellulose.

Benefits

It enhances the texture and stability of the product.

See more about Cellulose →
C12-20 Alkyl Glucoside
Neutral

C12-20 alkyl glucoside is used as an emulsifier and surfactant in cosmetics. It helps to improve the texture and application of the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks associated with C12-20 alkyl glucoside.

Benefits

It enhances the texture and application of the product.

Citric Acid
Neutral

Citric acid is used to adjust the pH of cosmetic formulations. It helps to stabilize the product and improve its effectiveness. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It stabilizes the product and improves its effectiveness.

See more about Citric Acid →
Isopropyl Alcohol
Neutral

Isopropyl alcohol is used as a solvent and antiseptic in cosmetics. It helps to improve the texture and application of the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It improves the texture and application of the product.

See more about Isopropyl Alcohol →
C14-22 Alcohols
Neutral

C14-22 alcohols are used as emollients and thickeners in cosmetics. They help to improve the texture and stability of the product. They are generally considered safe for use in cosmetics.

Risks

There are minimal risks associated with C14-22 alcohols.

Benefits

They enhance the texture and stability of the product.

Amyl Salicylate
Neutral

Amyl salicylate is used as a fragrance ingredient in cosmetics. It helps to impart a pleasant scent to the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Amyl Salicylate →
Benzyl Salicylate
Neutral

Benzyl salicylate is used as a fragrance ingredient in cosmetics. It helps to impart a pleasant scent to the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Benzyl Salicylate →
Citronellol
Neutral

Citronellol is used as a fragrance ingredient in cosmetics. It helps to impart a pleasant scent to the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Citronellol →
Citrus Aurantium Peel Oil
Neutral

Citrus aurantium peel oil is used for its fragrance and potential skin benefits. It helps to impart a pleasant scent and may have antioxidant properties. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent and may offer antioxidant benefits.

See more about Citrus Aurantium Peel Oil →
Dimethyl Phenethyl Acetate
Neutral

Dimethyl phenethyl acetate is used as a fragrance ingredient in cosmetics. It helps to impart a pleasant scent to the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

Geraniol
Neutral

Geraniol is used as a fragrance ingredient in cosmetics. It helps to impart a pleasant scent to the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Geraniol →
Geranyl Acetate
Neutral

Geranyl acetate is used as a fragrance ingredient in cosmetics. It helps to impart a pleasant scent to the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Geranyl Acetate →
Isoeugenyl Acetate
Neutral

Isoeugenyl acetate is used as a fragrance ingredient in cosmetics. It helps to impart a pleasant scent to the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Isoeugenyl Acetate →
Linalyl Acetate
Neutral

Linalyl acetate is used as a fragrance ingredient in cosmetics. It helps to impart a pleasant scent to the product. It is generally considered safe for use in cosmetics.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Linalyl Acetate →
Tetramethyl Acetyloctahydronaphthalenes
Neutral

Tetramethyl acetyloctahydronaphthalenes are used as fragrance ingredients in cosmetics. They help to impart a pleasant scent to the product. They are generally considered safe for use in cosmetics.

Risks

There are minimal risks, though they may cause mild irritation in sensitive individuals.

Benefits

They provide a pleasant scent to the product.

Sodium Benzoate
Bad

Synthetic preservative that can form benzene in the presence of vitamin C.

Risks

In rare cases, it may cause mild irritation or allergic reactions.

Benefits

It prevents microbial growth, extending the product's shelf life.

See more about Sodium Benzoate →
Potassium Sorbate
Bad

Synthetic preservative — flagged in daily-use products.

Risks

In rare cases, it may cause mild irritation or allergic reactions.

Benefits

It prevents microbial growth, extending the product's shelf life.

See more about Potassium Sorbate →
Benzyl Alcohol
Bad

Processed additive flagged under Scout's ingredient doctrine.

Risks

In rare cases, it may cause mild irritation or allergic reactions.

Benefits

It stabilizes the product and improves its texture.

See more about Benzyl Alcohol →
Limonene
Bad

Processed additive flagged under Scout's ingredient doctrine.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Limonene →
Linalool
Bad

Processed additive flagged under Scout's ingredient doctrine.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Linalool →
Pinene
Bad

Processed additive flagged under Scout's ingredient doctrine.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Pinene →
Vanillin
Bad

Processed additive flagged under Scout's ingredient doctrine.

Risks

There are minimal risks, though it may cause mild irritation in sensitive individuals.

Benefits

It provides a pleasant scent to the product.

See more about Vanillin →
Fragrance (Parfum)
Very Bad

Fragrance is used to impart scent to cosmetic products. It can contain a mixture of various chemicals, some of which may cause irritation or allergic reactions. It is generally considered a potential irritant in cosmetics.

Risks

Fragrance can cause irritation, allergic reactions, and sensitivity in some individuals.

Benefits

It provides a pleasant scent to the product.

See more about Fragrance (Parfum) →

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