If you've ever had a £200 colour appointment fade in three washes, the culprit was probably your shampoo. Sulfates — the cheap surfactants that make most drugstore shampoos foam aggressively — strip pigment alongside oil. The fix isn't expensive; it's just specific.
This guide explains why sulfate-free matters for coloured hair, what to look for, and how to build a wash routine that keeps your colour looking salon-fresh for weeks.
Why sulfates fade colour
Sulfates (sodium lauryl sulfate, sodium laureth sulfate, ammonium lauryl sulfate, etc.) are anionic surfactants that pull oil, dirt and unfortunately pigment out of the hair shaft. On uncoloured hair this is fine — too aggressive maybe, but not damaging to colour. On coloured hair it accelerates fade by weeks every wash.
Most "for coloured hair" shampoos on the supermarket shelf still contain sulfates. The bottle says "colour-protect" but the ingredient list says otherwise. Always check the first five ingredients.
What sulfate-free shampoo does differently
Sulfate-free shampoos use milder surfactants — cocamidopropyl betaine, decyl glucoside, coco-glucoside, sodium cocoyl isethionate. These clean by lifting dirt without dissolving the pigment molecules sitting in the cortex.
The trade-off is foam: sulfate-free shampoos lather less. People sometimes mistake this for "not cleaning properly." It is cleaning — it just doesn't bubble dramatically.
Five features to check before buying
- Sulfate-free surfactants (no SLS, no SLES, no ALS)
- Colour-locking ingredients (panthenol, hydrolysed wheat protein, UV filters)
- pH between 4.5 and 5.5 — closer to the natural pH of the cuticle
- Heat protection or anti-pollution claims — increasingly relevant for colour longevity
- Vegan, paraben-free, silicone-light formulations — gentler on coloured hair over the long term
The Moné Sparkling Shine Shampoo is built around an 8-oil complex specifically formulated for dull and coloured hair. The Maximum Color Shampoo goes a step further with plant-derived actives that preserve colour brightness wash after wash. For blonde and bleached hair, the Color Lemonade Shampoo layers truffle extract and amino acids for tone protection.
How to wash coloured hair to preserve colour longer
A few habits matter as much as the shampoo itself:
- Wash less frequently (2–3 times a week instead of daily)
- Use lukewarm water, not hot — heat opens cuticles and lets pigment escape
- Massage shampoo into the scalp only, let the suds rinse through the lengths
- Always pair shampoo with the matching conditioner — they're formulated to balance each other
- Use a weekly mask like the Maximum Color Mask or Color Lemonade Mask to reseal the cuticle and deposit moisture
If your tap water is hard (most of the UK), a clarifying shampoo once every 6–8 washes removes mineral buildup that dulls colour.
When to switch shampoos
Three signs you should change your current shampoo:
- Colour fades visibly within 2–3 washes
- Hair feels straw-like or squeaky right after washing
- Scalp is itchy or flaky after a wash
If two or more apply, you're using too aggressive a formula for coloured hair.
Frequently asked questions
Does sulfate-free shampoo clean as well as regular?
Yes — it removes oil, dirt and product buildup. It just foams less. If you used to over-shampoo, your scalp will probably feel cleaner with sulfate-free over time.
Is sulfate-free shampoo safe for daily use?
Yes, but most coloured hair benefits from 2–3 washes per week to preserve pigment.
Do I need to use a colour-protect conditioner too?
Strongly recommended. The shampoo opens the cuticle slightly to clean; the conditioner reseals it and locks pigment.
Can sulfate-free shampoo cause dandruff?
Quite the opposite usually — milder surfactants are gentler on the scalp microbiome. If dandruff appears, look at other factors (hard water, weather, stress).
Which Moné shampoo for blonde vs brunette coloured hair?
Blonde, bleached, balayage → Color Lemonade Shampoo. Brunette, brown, red, auburn coloured → Maximum Color Shampoo. For shine focus on darker shades or coloured hair that feels dull → Sparkling Shine Shampoo.
For your complete coloured-hair routine, shop the Coloured Hair Care collection. Free UK delivery on orders over £20, free Sparkling Shine Conditioner with any order over £25.