Quench! Moisture Intensive Leave-In Conditioner

US labelling rules put ingredients above 1% in descending order of amount; below 1% they may be listed in any order. Annotations keep three readings separate: the ingredient's general function, its role in this product type, and what its position can support.

• 1 Water · Aqua (Water)
  General function

  The base of almost every rinse-off and cream hair product. It carries everything else and is normally the first ingredient on the label.

  Leading ingredient

  Listed in the first three ingredients, it is likely a structural part of this formula.

  • solvent
• 2 Glycerin
  General function

  A small water-loving molecule that draws moisture into the hair and holds it there. It is the most common softening ingredient in conditioners and leave-ins.

  Leading ingredient

  Listed in the first three ingredients, it is likely a structural part of this formula.

  May suitDry, coarse, or high-porosity hair

  High-porosity hair loses water fast; a humectant holds some of it in place for longer than the wash itself would.

  May suitVery dry or highly damaged hair

  Binds water into the outer layers of the strand, and water is what makes dry hair flexible again rather than brittle.

  DependsClimate-sensitive or frizz-prone hair

  Water moves both ways. Measured across concentrations, glycerin solutions give water up in some conditions and take it from the air in others. What it does for you depends on how much of it is there and on the air around it.

  Scientific Reports
  • humectant
• 3 Cetearyl Alcohol
  General function

  A waxy fatty alcohol - nothing like drying alcohol. It gives conditioners their body and leaves a soft, smoothing film on the hair.

  Leading ingredient

  Listed in the first three ingredients, it is likely a structural part of this formula.

  May suitDry, coarse, or high-porosity hair

  The waxy solid that gives a conditioner its body. It deposits a soft lubricating layer, which is most of what makes hair feel smooth after rinsing.

  May suitFrizz-prone, damaged, or high-friction hair

  Deposits with the cationic conditioners and helps them lie flat along the strand, which is where the detangling actually comes from.

  DependsFine or easily flattened hair

  Near the top of a conditioner it is doing most of the conditioning, and most of the weighting, at the same time.

  PubChem
  • fatty alcohol
  • emollient
  • thickener
• 4 Cetyl Alcohol
  General function

  A fatty alcohol used to thicken creams and add slip. It softens rather than dries.

  Supporting ingredient

  Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

  May suitDry, coarse, or high-porosity hair

  The waxy solid that gives a conditioner its body. It deposits a soft lubricating layer, which is most of what makes hair feel smooth after rinsing.

  May suitFrizz-prone, damaged, or high-friction hair

  Deposits with the cationic conditioners and helps them lie flat along the strand, which is where the detangling actually comes from.

  DependsFine or easily flattened hair

  Near the top of a conditioner it is doing most of the conditioning, and most of the weighting, at the same time.

  PubChem
  • fatty alcohol
  • emollient
  • thickener
• 5 Aloe Barbadensis Leaf Extract
  General function

  A concentrated aloe extract used for light moisture and a soothing claim.

  Supporting ingredient

  Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

  May suitFine or easily flattened hair

  Hydration with no oil attached, so it adds very little weight even high on a list.

  May suitVery dry or highly damaged hair

  Aloe is mostly water carrying sugars that bind more of it, which is why it turns up as the base of moisture-first formulas.

  DependsClimate-sensitive or frizz-prone hair

  A humectant follows the air: it holds water in humid conditions and can give it up in very dry ones. Climate decides what it does more than the label does.

  • botanical extract
  • humectant
• 6 Behentrimonium Methosulfate
  General function

  A mild cationic conditioner known for heavy detangling with a light rinse-out feel. Common in curly-hair conditioners.

  Supporting ingredient

  Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

  May suitDry, coarse, or high-porosity hair

  A C22 conditioning quat, the chain length that deposits most heavily in electrokinetic testing. It is the slip coarse or porous hair usually needs, delivered by chain length rather than by charge alone.

  May suitFrizz-prone, damaged, or high-friction hair

  A cationic conditioning agent: it binds to the damaged, negatively charged parts of the cuticle and lowers combing friction there.

  May suitVery dry or highly damaged hair

  The class that does the detangling in a conditioner. It deposits lubrication where the cuticle is worn.

  International Journal of Cosmetic Science
  • conditioning agent
  • emulsifier
• 7 Althaea Officinalis Root Extract
  General function

  An extract from the root of Althaea Officinalis. Plant extracts are used across a wide range of levels, and label order is the best guide to how much is here.

  Supporting ingredient

  Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

  • botanical extract
• 8 Ulmus Fulva Bark Extract
  General function

  An extract from the bark of Ulmus Fulva. Plant extracts are used across a wide range of levels, and label order is the best guide to how much is here.

  Supporting ingredient

  Listed in positions 4–8, it likely makes a meaningful contribution alongside the formula's main ingredients.

  • botanical extract
• 9 Argania Spinosa Kernel Oil · Argania Spinosa (Argan) Kernel Oil
  General function

  Argan oil. A medium-weight oil used for shine and softness on the outside of the strand.

  Secondary ingredient

  Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

  May suitDry, coarse, or high-porosity hair

  Coats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.

  May suitFrizz-prone, damaged, or high-friction hair

  A thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.

  • oil
  • emollient
• 10 Butyrospermum Parkii (Shea) Butter
  General function

  A rich, solid plant butter used for heavy conditioning on coarse or dry hair. High in the list it makes a product decidedly heavy.

  Secondary ingredient

  Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

  May suitDry, coarse, or high-porosity hair

  Coarse, porous hair loses water quickly and can carry the weight; a butter slows that loss more than a thin oil does.

  May suitFrizz-prone, damaged, or high-friction hair

  Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

  May suitVery dry or highly damaged hair

  A solid fat melts onto the strand at body temperature and stays there, which is the heaviest surface moisture-holding a formula can offer.

  • butter
  • emollient
  • sealant
• 11 Olea Europaea (Olive) Fruit Oil
  General function

  A heavy, coating oil traditionally used for deep conditioning.

  Secondary ingredient

  Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

  May suitDry, coarse, or high-porosity hair

  Coats the surface and slows water leaving the strand, which is usually what coarse hair that dries out fast is missing.

  May suitFrizz-prone, damaged, or high-friction hair

  A thin oil layer lowers friction between strands and flattens the raised cuticle that scatters light and catches on its neighbours.

  • oil
  • emollient
• 12 Panthenol
  General function

  Provitamin B5. It draws in water and penetrates the strand a little, which is why it is the standard ingredient for softness and shine claims.

  Secondary ingredient

  Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

  May suitFine or easily flattened hair

  It hydrates without adding oil or a film, which is the combination fine hair usually needs.

  May suitFrizz-prone, damaged, or high-friction hair

  Deposits a lubricating layer that makes combing easier, which is most of what stops mechanical damage adding to frizz.

  May suitVery dry or highly damaged hair

  A humectant that also penetrates the cuticle, so it holds water inside the strand rather than only on the surface.

  PubChem
  • humectant
  • conditioning agent
  • vitamin
• 13 Hydrolyzed Wheat Protein
  General function

  Wheat protein broken into fragments small enough to cling to the hair. It adds temporary strength and body; too much can feel stiff.

  Secondary ingredient

  Lower in the ordered portion of the list, it is more likely playing a supporting role than defining the formula.

  May suitFrizz-prone, damaged, or high-friction hair

  Filling surface gaps evens out the cuticle, which is part of what makes damaged hair comb and reflect light more like undamaged hair.

  May suitMaximum-hold styling

  Film formers are what hold a style: they dry into a connected film across the strands so the shape resists movement.

  May suitVery dry or highly damaged hair

  Hydrolysed fragments are small enough to sit in the gaps of a worn cuticle for a wash or two, temporarily restoring stiffness and cutting breakage in combing.

  • film former
  • protein
  • hydrolysed protein
• ▾Below about this point, order stops being meaningful — these are typically used at 1% or less.
• 14 Dehydroacetic Acid
  • preservative
• 15 Citric Acid
  General function

  Used to bring the product to a slightly acidic pH, which helps the cuticle lie flat. It is almost always near the end of the list.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May suitBuild-up-sensitive routines

  Holds hard-water minerals in solution so they rinse away instead of depositing on the hair.

  May suitFrizz-prone, damaged, or high-friction hair

  The acid side of pH adjustment, and the reason it matters is measured: alkaline formulas raise the fibre's surface negative charge, increase friction between strands and lift the scales, while lower-pH ones do the reverse.

  May suitGray, silver, or brass-prone hair

  Where a warm cast comes from water minerals rather than from the hair itself, holding those metals in solution is what removes it.

  International Journal of Trichology
  • pH adjuster
  • hard-water chelator
• 16 Phenoxyethanol
  • preservative
• 17 Ethylhexylglycerin
  General function

  A preservative booster that also adds a little softness. Almost always paired with phenoxyethanol.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May suitFrizz-prone, damaged, or high-friction hair

  Emollients fill and smooth the surface of the strand, which lowers the friction that lifts the cuticle and reads as roughness.

  PubChem
  • preservative
  • emollient
• 18 Sodium Benzoate
  • preservative
• 19 Potassium Sorbate
  • preservative
• 20 Fragrance · Parfum (Fragrance)
  General function

  An undisclosed blend of scent ingredients. Regulations let it stay unlisted, so a fragrance-free product is the only way to be certain what is not in it.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.

  • fragrance
  • declared fragrance
• 21 Benzyl Alcohol
  • preservative
  • solvent
• 22 Limonene
  General function

  A citrus-smelling fragrance component that EU rules require to be named separately because some people react to it.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

  PubChem
  • fragrance
  • named fragrance allergen
• 23 Hexyl Cinnamal
  General function

  A jasmine-like fragrance component named separately as a recognised allergen.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

  PubChem
  • fragrance
  • named fragrance allergen
• 24 Linalool
  General function

  A floral fragrance component listed separately as a recognised contact allergen.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

  PubChem
  • fragrance
  • named fragrance allergen
• 25 Amyl Cinnamal
  General function

  A jasmine-like fragrance component named separately as a recognised allergen.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

  PubChem
  • fragrance
  • named fragrance allergen
• 26 Citronellol
  General function

  A rose-like fragrance component named separately as a recognised allergen.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

  PubChem
  • fragrance
  • named fragrance allergen
• 27 Hydroxycitronellal
  General function

  A soft floral fragrance component named separately as a recognised allergen.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  One of the 26 scent components the EU requires to be named individually above a threshold. It is named because it is a known contact allergen, not because it is unusual.

  PubChem
  • fragrance
  • named fragrance allergen
• 28 Citrus Aurantium Amara (Orange) Peel Oil
  General function

  The essential oil of Citrus Aurantium. Essential oils are aromatic — they are in the formula for scent, and they are a common source of declared fragrance allergens.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.

  • fragrance
  • botanical extract
• 29 Dimethyl Phenyl Acetate
• 30 Hexamethylindanopyran
  General function

  A synthetic musk used as a long-lasting fragrance base note.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May not suitFragrance-sensitive routines

  Declared fragrance. On a fragrance-sensitive routine this is the line that decides it, wherever it sits on the label.

  PubChem
  • fragrance
• 31 Yellow 5
  General function

  A certified colour added to tint the product itself. It does not colour hair.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May suitGray, silver, or brass-prone hair

  A violet or blue colorant sits opposite yellow on the colour wheel, so a trace of it deposited on the surface makes a warm cast read cooler. It washes out over the following few washes.

  • colourant
• 32 Blue 1 (CI 42090) · Blue 1
  General function

  A certified colour used to tint the product itself, not the hair.

  Estimated lower-concentration zone

  It appears around or below the estimated 1% line, where label order no longer indicates relative amount; its role may be minor or technical.

  May suitGray, silver, or brass-prone hair

  A violet or blue colorant sits opposite yellow on the colour wheel, so a trace of it deposited on the surface makes a warm cast read cooler. It washes out over the following few washes.

  • colourant
  • direct dye
  • blue dye

What the whole list adds up to

• 9 fragrances
• 6 emollients
• 6 preservatives
• 6 named fragrance allergens
• 4 botanical extracts
• 3 humectants
• 2 solvents
• 2 fatty alcohols
• 2 thickeners
• 2 oils
• 2 colourants
• 1 conditioning agent
• 1 emulsifier
• 1 butter

Ingredient list captured 2026-08-21. Formulas change — check the package in your hand when an ingredient matters to you.