Glass Hair Smoothing Oil

By Sleek

Rated 4.5 out of 5 (2)

Price range: £16.00 through £36.00

What it does

Benefits

  • Tames frizz and flyaways instantly
  • Seals split ends
  • Glass-like shine, never greasy

Suits

Suitable for all hair types.

Targets

Dryness, Frizz

Formula & key ingredients

Hero ingredients

  • Argan OilTames frizz and adds mirror shine
  • Marula OilWeightless moisture that never sits greasy

Full ingredients (INCI)

Cyclopentasiloxane, Dimethiconol, Argania Spinosa Kernel Oil, Sclerocarya Birrea Seed Oil, Tocopherol, Parfum, Limonene, Linalool.

A weightless dry oil that tames frizz, seals split ends and leaves hair with a glossy, glass-like finish — never greasy.

How to use

  • How often

    On damp or dry hair

  • Where

    Mid-lengths & ends

  • How

    Warm 2–3 drops between palms and smooth through, before or after styling. Avoid the roots on fine hair.

A fast-absorbing blend of argan and marula oils smooths flyaways and adds instant mirror shine on damp or dry hair. Light enough for fine hair, nourishing enough for coarse — a few drops is all it takes.

Specification

Brand
Sleek
Format
Lightweight dry oil
Hair type
All hair typesDry / damagedThick
Free from
Parabens
Certifications
Cruelty-freeVegan
Size
100ml30ml
Hair Concern
DrynessFrizz
Ingredient
Argan OilMarula Oil
SKU
DEMO-HR-03
Royal Mail Tracked 24
  • Order before 9 pm for same-day dispatch and next-day delivery*
  • Deliveries are made 7 days a week (excluding postcode exceptions* and bank holidays)
  • Tracked service with a 2 hour delivery window
  • Safe place option
  • FREE on orders over £30
  • £2.99 for orders under £30

*Orders to remote areas listed on Royal Mail's exclusions list may not arrive until a day later.

DPD Local & DPD Local Pickup
  • Order before 9 pm for same-day dispatch and next-day delivery
  • Deliveries are made 7 days a week (excluding bank holidays)
  • Tracked service with a 1 hour delivery window
  • Signature required, or safe place option and collection point
  • £4.99 for orders under £20 (£6.99 at weekends)
  • £3.99 for orders between £20 and £59.99 (£5.99 at weekends)
  • £1.99 for orders over £60 (£3.99 at weekends)
  • FREE for orders over £100 (£150 at weekends)
EVRI
  • Order before 4:30 pm on weekdays for same-day dispatch
  • Order before 11 am on Saturday for same-day dispatch
  • Deliveries are made Monday to Saturday (excluding bank holidays)
  • Fully tracked service
  • £1.99 for orders under £30
  • Two-day service FREE on orders over £30
Royal Mail Special Delivery
  • Order before 9 pm for same-day dispatch and next-day delivery*
  • Deliveries are made Monday to Saturday (excluding bank holidays)
  • Tracked service with a 1 hour delivery window
  • Signature required
  • £7.99 for orders under £20
  • £6.99 for orders between £20 and £59.99
  • £5.99 for orders between £60 and £99.99
  • £4.99 for orders over £100

*Orders to remote areas listed on Royal Mail's exclusions list may not arrive until a day later.

All orders are sent in discreet packaging.

Please view our delivery page for further information.

Reviews

4.5

Based on 2 reviews

  • 5 1
  • 4 1
  • 3 0
  • 2 0
  • 1 0
  • Effectiveness 4.5
  • Texture & feel 4.5
  • Value for money 4.5

2 reviews for Glass Hair Smoothing Oil

  1. Priya D. (verified owner)

    Actual glass hair

    • Effectiveness
    • Texture & feel
    • Value for money

    Two drops and my frizz is gone with the shiniest finish. Not greasy at all.

  2. Sam W. (verified owner)

    A little goes far

    • Effectiveness
    • Texture & feel
    • Value for money

    Great shine but easy to overdo on fine hair — start with one drop.

Add a review

Your email address will not be published. Required fields are marked *

Rate this product
Effectiveness
Texture & feel
Value for money

Why Beautyforest

Meets The Beautyforest Standard

  • Clean & naturally derivedNo greenwashing, no empty claims
  • Science-backedFormulas proven to actually work
  • Cruelty-freeKinder beauty by default
  • Free UK delivery over £30Easy 30-day returns