TRESemme 4 Plus 4 Thickening Extra Hold Mousse 10.5 oz
Analysis updated July 2026 · How Scout scores
At a glance
Summary
This hair mousse contains a mix of beneficial and concerning ingredients. While hydrolyzed elastin is a positive addition for hair health, the presence of synthetic fragrance can cause irritation and allergic reactions. The product is moderately processed, which limits its overall score despite some beneficial components.
Key ingredients 21
HYDROLYZED ELASTINGood
Hydrolyzed Elastin is a protein that helps to improve the elasticity and strength of hair. It is derived from natural sources and is beneficial for hair health. It is considered safe and effective in hair care products.
Risks
There are minimal risks associated with its use in cosmetics.
Benefits
Improves hair elasticity and strength.
GLYCERINGood
Beneficial ingredient — whole-food or functional value in this product class.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Helps to retain moisture and improve hair hydration.
WATER (AQUA)Neutral
Water is a common solvent used in many cosmetic products. It helps to dissolve other ingredients and provides a base for the formulation. It is generally considered safe and non-irritating.
Risks
There are no significant risks associated with water in cosmetic formulations.
Benefits
Water helps to hydrate and provide a smooth application of the product.
ISOBUTANENeutral
Isobutane is a propellant used in aerosol products. It helps to dispense the product in a fine mist. It is generally considered safe when used in cosmetics.
Risks
Inhalation of large amounts can be harmful, but typical cosmetic use poses minimal risk.
Benefits
Allows for even application of the product.
HYDROFLUOROCARBON 152ANeutral
Hydrofluorocarbon 152A is used as a propellant in aerosol products. It helps to deliver the product in a spray form. It is considered safe for use in cosmetics.
Risks
Inhalation in large quantities can be harmful, but cosmetic use is generally safe.
Benefits
Provides effective product delivery in aerosol form.
VP/VA COPOLYMERNeutral
VP/VA Copolymer is a film-forming agent that helps to hold hair in place. It is commonly used in hair styling products. It is considered safe for use in cosmetics.
Risks
May cause build-up on hair with frequent use.
Benefits
Provides hold and styling benefits to hair.
GELATIN/KERATIN AMINO ACIDS/LYSINE HYDROXYPROPYLTRIMONIUM CHLORIDENeutral
This combination of ingredients is used to condition and strengthen hair. They are derived from proteins and help to improve hair texture. They are generally considered safe for use in hair care products.
Risks
May cause build-up on hair with excessive use.
Benefits
Conditions and strengthens hair.
PROPANENeutral
Propane is used as a propellant in aerosol products. It helps to dispense the product in a fine mist. It is considered safe for use in cosmetics when used appropriately.
Risks
Inhalation of large amounts can be harmful, but typical cosmetic use poses minimal risk.
Benefits
Allows for even application of the product.
POLQUATERNIUM-11Neutral
Polyquaternium-11 is a film-forming agent that provides hold and conditioning to hair. It is commonly used in hair styling products. It is considered safe for use in cosmetics.
Risks
May cause build-up on hair with frequent use.
Benefits
Provides hold and conditioning benefits to hair.
POLYSORBATE 20Neutral
Polysorbate 20 is an emulsifier that helps to mix oil and water-based ingredients. It is commonly used in cosmetics to stabilize formulations. It is considered safe for use in cosmetics.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Helps to stabilize and improve the texture of the product.
PVPNeutral
PVP is a film-forming agent that provides hold and styling benefits to hair. It is commonly used in hair styling products. It is considered safe for use in cosmetics.
Risks
May cause build-up on hair with frequent use.
Benefits
Provides hold and styling benefits to hair.
POLYQUATERNIUM-4Neutral
Polyquaternium-4 is a film-forming agent that provides hold and conditioning to hair. It is commonly used in hair styling products. It is considered safe for use in cosmetics.
Risks
May cause build-up on hair with frequent use.
Benefits
Provides hold and conditioning benefits to hair.
PPG-12-PEG-50 LANOLINNeutral
PPG-12-PEG-50 Lanolin is an emollient that helps to moisturize and condition hair. It is derived from lanolin and is commonly used in hair care products. It is considered safe for use in cosmetics.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Moisturizes and conditions hair.
OLEALKONIUM CHLORIDENeutral
Olealkonium Chloride is a conditioning agent that helps to improve the texture and manageability of hair. It is commonly used in hair care products. It is considered safe for use in cosmetics.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Improves hair texture and manageability.
POLYQUATERNIUM-7Neutral
Polyquaternium-7 is a conditioning agent that helps to improve the texture and manageability of hair. It is commonly used in hair care products. It is considered safe for use in cosmetics.
Risks
May cause build-up on hair with frequent use.
Benefits
Improves hair texture and manageability.
CYCLOPENTASILOXANENeutral
Cyclopentasiloxane is a silicone used to provide a smooth application and silky feel to hair. It is commonly used in hair care products. It is considered safe for use in cosmetics.
Risks
May cause build-up on hair with frequent use.
Benefits
Provides a smooth application and silky feel to hair.
SORBITOLNeutral
Sorbitol is a humectant that helps to retain moisture in the hair. It is commonly used in cosmetics to improve texture and hydration. It is considered safe for use in cosmetics.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Helps to retain moisture and improve hair hydration.
COCAMIDOPROPYL BETAINENeutral
Cocamidopropyl Betaine is a surfactant that helps to cleanse and condition hair. It is derived from coconut oil and is commonly used in hair care products. It is considered safe for use in cosmetics.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Cleanses and conditions hair.
SODIUM BENZOATEBad
Synthetic preservative that can form benzene in the presence of vitamin C.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Prevents microbial growth and extends product shelf life.
PROPYLENE GLYCOLBad
Processed additive flagged under Scout's ingredient doctrine.
Risks
May cause mild irritation in sensitive individuals.
Benefits
Helps to retain moisture and improve hair hydration.
FRAGRANCE (PARFUM)Very Bad
Fragrance is used to impart a pleasant scent to the product. However, it can cause allergic reactions and skin irritation in sensitive individuals. It is often criticized for its potential to cause adverse reactions.
Risks
May cause skin irritation and allergic reactions.
Benefits
Provides a pleasant scent to the product.
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