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Product guide

OUAI Hair Oil, 45 ml

OUAI Hair Oil is a leave-in oil for smoothing frizz and split ends while adding shine. The listing claims heat protection up to 450°F / 232°C and suggests using 1–3 drops on wet or dry hair, or leaving it on overnight.

At a glance

Listing claims heat protection up to 450°F / 232°C and protection from UV-related colour fading.
Can be applied to wet hair, dry hair after a blowout, or left on overnight, according to the listing.
The formula is described as paraben-, phthalate- and sulphate-free.

Price

£19.50Save 25%

Reference price: ~~£26.00~~

Price checked: 12 Nov 2026

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Often bought together

OUAI Detox Shampoo - Clarifying Shampoo for Build Up, Dirt, Oil, Product and Hard Water - Apple Cider Vinegar & Keratin for Clean, Refreshed Hair - Sulfate-Free Hair Care - 300ml

£21.37

OUAI Fine Shampoo and Conditioner Set - Sulfate Free Shampoo and Conditioner for Fine Hair - Made with Keratin, Marshmallow Root, Shea Butter & Avocado Oil - Free of Parabens & Phthalates - 300 ml

£42.00

Pros and cons

Pros

Multiple suggested uses make it suitable for a small styling step as well as overnight conditioning.
Customer feedback describes the oil as lightweight and helpful for frizz without making hair look greasy.

Cons

Some customers consider it too expensive.

Technical specifications

12 specifications

Identity and format
Brand	OUAI
Item form	Oil
Scent	The fragrance of the brand Ouai
Hair type	Color Treated
Liquid volume	1.5 Fluid Ounces
Number of items	1
Material type free	Paraben Free, Phthalate Free, Sulphate Free

Dimensions and weight
Dimensions listed	3.8 x 3.8 x 10.2 cm; 56.7 g
Weight listed	2 Ounces

Claimed benefits and use
Product benefits	UV/Heat Damage Protection, Frizz Control, Shine Add, Split End Treatment, Safe for Colored Hair
Heat protection claim	Protects from heat damage up to 450°F / 232°C.
Suggested amount and use	Work 1-3 drops of this hair oils magic formula through wet hair, add to dry hair after a blowout, or leave on overnight as an intense hydrating mask.

What to know before buying

Listing details to confirm

The listing gives the size as both 45 ml and 1.5 Fluid Ounces. It also lists dimensions with a 56.7 g figure and separately gives the item weight as 2 Ounces. These volume and weight details are inconsistent, so confirm the selected product variant if exact measurements matter. Heat, UV and colour-protection statements are listing claims, not independently verified performance results.

Who is it for?

A good fit for

People with colour-treated hair seeking a leave-in oil for frizz, shine and split-end smoothing.
Buyers looking for a product described as lightweight in customer feedback and suitable for curly hair.
Those who want an oil with wet-hair, post-blowout and overnight-use instructions.

Less suited to

Shoppers who avoid fragranced hair products.
Buyers prioritising a low-cost hair oil, as some customers consider this product expensive.

OUAI Hair Oil, 45 ml · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 7,757 ratings

5 stars74%74%
4 stars13%13%
3 stars6%6%
2 stars3%3%
1 star4%4%

Customer feedback highlights perceived effectiveness, frizz control, a lightweight feel, and a pleasant fragrance, with particular mentions of curly hair. Some customers say it does not leave hair looking greasy, while opinions on price are mixed. These comments may matter if you want an oil intended for smoother-looking hair without a heavy finish, but they do not establish how it will perform on every hair type.

Positive themes

Customers describe the oil as effective for frizz control, including on curly hair.
Feedback praises its lightweight feel and fragrance.

Negative themes

Some customers consider the product too expensive.

Mixed feedback

Customer views on whether it is worth the price are mixed.

Frequently asked questions

How much oil does the listing recommend?

It suggests working 1–3 drops through wet hair or applying the oil to dry hair after a blowout. It also describes overnight use as a hydrating mask.

What heat protection does OUAI claim?

The listing claims protection from heat damage up to 450°F / 232°C. This is a product claim, not an independently verified result.

Is it suitable for colour-treated hair?

The listing describes it as safe for coloured hair and claims protection against UV-related colour fading.

What size is listed?

The title gives 45 ml, while the details also state 1.5 Fluid Ounces. The listing's volume entries are inconsistent, so check the variant details if exact size matters.