Paul Mitchell
Paul Mitchell Smoothing Serum 25 ml
- Order by 2pm on weekdays for same-day dispatch
- Free UK delivery over £30
- Free click & collect in Bridlington
- Genuine stock from a Paul Mitchell Signature Salon
Why we rate it
A smoothing serum with just three ingredients and no fragrance or dyes, part of Paul Mitchell's Clear collection for people with sensitivities. It works as a lightweight blow-dry primer that speeds up drying, and it smooths frizz, seals split ends and adds shine. Apply a small amount to clean, damp hair before drying, or to dry hair to finish, focusing on the mid-lengths and ends. On coarse hair, layer it with Styling Glaze.
- Just three ingredients; fragrance-free and dye-free
- Lightweight blow-dry primer that speeds drying
- Smooths frizz and seals split ends
- Adds shine
- Colour-safe
Who it’s for
Hair type
- All hair types
Good for
- Split ends
- Frizz
- Heat styling
- Sensitive skin
How to use
- Apply a small amount to clean, damp hair to speed up drying — or to dry hair to finish.
- Focus on mid-lengths and ends.
- Style as usual; on coarse hair, layer with Styling Glaze.
Key ingredients
- Minimal formula (3 ingredients)
- Two silicones and a silicone alternative for slip, smoothness and shine.
Full ingredients
Isododecane, Dimethicone, Dimethiconol
Ingredients from Paul Mitchell UK · checked 29 September 2026. Formulations can change, so always check the pack.
Good to know
- Vegan
- Cruelty-free
- Colour-safe
- Paraben-free
- Made without gluten
- Fragrance-free
- Dye-free
- Dermatologist-tested
- Paediatrician-tested
Formula claims as stated by Paul Mitchell.
Scent Fragrance-free
Stylist’s tip
Rub a small amount between your palms and smooth it over the mid-lengths and ends first, then use whatever is left on your hands nearer the roots.
From the stylists at The Color, Bridlington Paul Mitchell Signature Salon since 2006
Not sure it suits your hair? Call the salon on 01262 671 167
Delivery & returns
- Free UK delivery over £30, otherwise £3.95.
- Order by 2pm Monday to Friday for same-day dispatch. Delivery usually takes 1–3 working days.
- Free click & collect from our salon at 55 Flamborough Road, Bridlington, YO15 2JH. We’ll email you when it’s ready.
- 30-day returns on unopened items. Read our returns policy
Frequently Asked Questions
Do you put smoothing serum on wet or dry hair?
Either. Use a small amount on clean, damp hair to speed up drying, or on dry hair to finish, focusing on the mid-lengths and ends rather than the roots.
Does Paul Mitchell Smoothing Serum help with frizz?
Yes. It smooths frizz, seals split ends and adds shine, and as a blow-dry primer it helps hair dry faster.
What sizes does the Smoothing Serum come in?
25 ml and 150 ml. The 25 ml is a handy travel size or a way to try it first.
Is it safe for colour-treated hair?
Yes. Paul Mitchell lists it as colour-safe. It's also fragrance-free and dye-free, with just three ingredients.