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OUAI Thickening Spray 177ml frosted bottle with white cap on beige background.
A hand holding a frosted glass spray bottle labeled OUAI Thickening Spray, with the spray misting out against a solid black background.
A hand holding a frosted bottle of OUAI Thickening Spray against a black background, with text highlighting key ingredients: amaranth peptide, amino acid, and volume polymers.
A bottle of OUAI thickening spray centered on a reflective surface with botanical props including green grass, flowers, fig, and ginger. Text at the top reads 'CAPE TOWN FRAGRANCE' and text at the bottom lists notes: ginger basil, spearmint, green fig, wet grass.
Before and after comparison of a woman's blonde hair, showing straight hair on the left labeled 'BEFORE' and wavy hair on the right labeled 'AFTER'.
Before and after comparison of a woman with long red hair, showing the hair styled differently against a light gray background. The left side is labeled 'BEFORE' and the right side is labeled 'AFTER'.
A four-panel instructional collage showing a woman demonstrating the use of a hair serum. Text overlays read: Step 1 Drop Scalp Serum using the pipette, Step 2 Massage into scalp, Step 3 Spray Thickening Spray on wet hair from roots to ends, and Step 4 Air dry or style with heat to turn thickness all the OUAl up.
A blonde woman in a white ribbed mock-neck top holds a silver and white OUAI hair product bottle against a solid light gray background.
A blonde woman in a black puffer jacket holds up a clear bottle of D'OUAI hair product against a brown padded background.
OUAI Thickening Spray 177ml frosted bottle with white cap on beige background.
A hand holding a frosted glass spray bottle labeled OUAI Thickening Spray, with the spray misting out against a solid black background.
A hand holding a frosted bottle of OUAI Thickening Spray against a black background, with text highlighting key ingredients: amaranth peptide, amino acid, and volume polymers.
A bottle of OUAI thickening spray centered on a reflective surface with botanical props including green grass, flowers, fig, and ginger. Text at the top reads 'CAPE TOWN FRAGRANCE' and text at the bottom lists notes: ginger basil, spearmint, green fig, wet grass.
Before and after comparison of a woman's blonde hair, showing straight hair on the left labeled 'BEFORE' and wavy hair on the right labeled 'AFTER'.
Before and after comparison of a woman with long red hair, showing the hair styled differently against a light gray background. The left side is labeled 'BEFORE' and the right side is labeled 'AFTER'.
A four-panel instructional collage showing a woman demonstrating the use of a hair serum. Text overlays read: Step 1 Drop Scalp Serum using the pipette, Step 2 Massage into scalp, Step 3 Spray Thickening Spray on wet hair from roots to ends, and Step 4 Air dry or style with heat to turn thickness all the OUAl up.
A blonde woman in a white ribbed mock-neck top holds a silver and white OUAI hair product bottle against a solid light gray background.
A blonde woman in a black puffer jacket holds up a clear bottle of D'OUAI hair product against a brown padded background.

Thickening Spray

This Thickening Spray instantly gets your strands looking thicker & fuller. It helps repair for hair that’s soft & healthy with volume that lasts.
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Get thick quick. Thickening Spray will get your strands looking thicker & fuller instantly. It also adds volume that lasts all day and helps repair hair to keep it soft & healthy. Count on Thickening Spray to deliver heat protection up to 450° so you can turn the thickness all the OUAI up by styling with heat & stay protected. 

Product Claims:

  • Instantly thicker, fuller-looking hair.*
  • Fuller-looking hair with no sticky or crunchy feel.*
  • Helps protect hair from heat damage up to 450°F/232°C.*
  • Up to 1.7x more volume that lasts all day.*

*Claim-support and clinical lab testing (P&G; TRI/Princeton, 2024). Fullness vs. non-conditioning shampoo; feel vs. non-conditioning shampoo; heat protection vs. heat-only control; volume vs. untreated hair.

How to use

Start with clean wet hair
Apply Thickening Spray as the last step in your styling routine. 
Hold the bottle 6–8 inches away and spray evenly from roots to ends. 
Avoid over saturating your hair with the spray to prevent a sticky or heavy feel.
Focus on the roots for maximum lift and volume.
Comb through using a wide-tooth comb to distribute the product evenly throughout your hair.
Heat style for maximum thickness.
Tip: Blow-dry your hair using a round brush or by lifting the roots with your fingers. 
Once dry, style your hair as usual. For a shiney finish try OUAI’s HAIR OIL. 

ingredients

Aqua / Water / Eau, Polysorbate 20, Vp/Va Copolymer, Amaranthus Caudatus Seed Extract, Sodium Hyaluronate, Glycerin, Ceratonia Siliqua (Carob) Seed Extract, Hydrolyzed Soy Protein, Zea Mays (Corn) Starch, Polyquaternium-16, Hydroxypropylgluconamide, Hydroxypropylammonium Gluconate, Guar Hydroxypropyltrimonium Chloride, Polyquaternium-7, Pisum Sativum Sprout Extract, Ethylhexylglycerin, Tocopherol, Citric Acid, Tartaric Acid, Trisodium Ethylenediamine Disuccinate, Phenoxyethanol, Benzyl Alcohol, Potassium Sorbate, Sodium Benzoate, Parfum / Fragrance, Eugenol, Limonene, Linalool, Tetramethyl Acetyloctahydronaphthalenes, Eucalyptus Globulus Oil, Citrus Aurantium Bergamia Peel Oil, Citrus Limon Peel Oil, Mentha Viridis Leaf Oil, Pinene, Carvone, Linalyl Acetate, Lavandula Oil / Extract, Anethole, Terpineol.

As always, all of our products are:
Paraben-Free, Cruelty-Free, Gluten-Free, Phthalate-Free, SLS and SLES-Free

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Thickening Spray

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THE SCENT:
CAPE TOWN

TOP NOTES

Ginger, Basil, Spearmint

MIDDLE NOTES

Tomato Leaves, Green Fig

BASE NOTES

Ambroxan, Wet Grass

HOW TO USE

STEP 1:

Drop Scalp Serum using the pipette

STEP 2

Massage into scalp

STEP 3:

Spray Thickening Spray on wet hair from roots to ends

STEP 4:

Air dry or style with heat to turn thickness all the OUAI up

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Overall rating: 4.712 / 5 from 125 reviews.

AI Generated Review Summary

Thickening Spray offers noticeable volume and texture boost, leaving hair soft, healthy, and voluminous. It provides a fuller and healthier look, with heat protection up to 450° and no sticky residue. Customers also appreciate its amazing and fresh smell.

Summary topics

  • Volume Boost (8%): It was observed by customers that this spray gives a noticeable boost in their hair's volume and texture.
  • Hair Look (13%): Customers keep praising how this product gives their hair a fuller and healthier look after just a few uses.
  • No Sticky Residue (8%): Customers loved the fact that the product doesn't leave any sticky residue on their hair, providing a natural bounce all day.
  • Product Smell (41%): Many customers brought up that the product smells amazing and fresh, with some even describing it as fresh and luxurious.
  • Hair Lift (8%): Customers keep praising the noticeable lift this spray provides without weighing hair down or leaving it sticky.

Review topics: ["volume","fragrance","improvement","smells","results","feels","texture","works","bottle","look","hair","difference","residue","boost","body","spray","formula","thickness","gift","lift","softness","heat protection","fullness","addition","use","shine","movement","ouai","mist","friend"].

Review highlights

  • "OUAI Thickening Spray adds instant volume and body without weighing hair down." — heidi
  • "I love the scent, it makes my hair look very sleek." — Geo
  • "My hair feels fuller and looks healthier after just a few uses." — Cheyenne

Reviews

THE SMELL!!!

"Bought this at a discount store way below retail price, purely because the bottle looked aesthetic and I wanted it for bathroom decor. Literally had zero clue what it actually was. I was honestly gonna dump the liquid out and refill it with something else I actually use. But I decided to give it a shot and WOW! My hair smells insane and looks so good. The scent is definitely the best part. People keep telling me I smell amazing whenever they are near me, asking what perfume I’m wearing when it’s literally just this spray. 10/10 bought it just for the vibes, guilty as charged, but now it’s officially a staple on my bathroom and I will keep buying it."

— Sofia (5/5)

"I just used it today & i really like it!"

— Maria (5/5)

It’s just okay

"The best part of this product, and why I still use it, is the scent. While it does give my hair some thickness, it also weighs it down and makes it flat."

— Emily M. (3/5)

Not sure about this one

"I used this, guessing about how much to spray on my hair, and found it left my hair sticky and dull. Did I use too much? It's hard to say without suggestions on the packaging."

— Barbara W. (3/5)

I think it works

"I think it really works to hold my style"

— suzanne F. (5/5)

Not for me

"Everyone’s hair is different of course and this seemed to leave my hair sticky."

— Patricia M. (1/5)

GAME CHANGER

"OMG! Just a spritz throughout my clean damp hair and my life is suddenly better! My hair has body and bounce and shine! You've never seen me before but I promise my hair is better!"

— PlanetFabulous (5/5)

LOVE FOR MY FINE HAIE

"FINALLY SOMETHING THAT WORKS WITHOUT LEAVING STRINGY DRY HAIR - LOVE"

— kim B. (5/5)

"Love"

— Megan (4/5)

"Really love this product it’s definitely got my hair looking thicker."

— Samantha S. (5/5)

Q&A

Do you use this product instead of the leave in conditioner since it is also a heat protectant. Also does it work well to hold curled or flat ironed styles?
Hi Lisa! Great question! The Thickening Spray does offer heat protection up to 450°F, but it's not a replacement for the Leave In Conditioner since it doesn't provide the same detangling, hydration, or frizz-fighting benefits. For best results, we recommend using both! Apply the Leave In Conditioner first, then follow with the Thickening Spray before heat styling. :)
Do I need to blow dry/heat to activate this? Can it natural dry and work? ( i have curly hair and would prefer no heat)
Hi Gigi, Yes, we recommend you to blow dry your hair for best result or heat style for maximum thickness. Tip: Blow-dry your hair using a round brush or by lifting the roots with your fingers. You may also find the full instructions directly on the product page. Hope this helps!