

Clairol ColourStrong Dark Brown 4.0 delivers intense, multidimensional colour while actively reinforcing your hair’s structure. This formula is designed to integrate strength and colour using a continuous system featuring AHA (alpha-hydroxy-acid) at every stage of application.
Experience lasting depth and structural reinforcement with this advanced permanent hair dye.
Read MoreMULTIDIMENSIONAL COLOUR WITH AHA (alpha-hydroxy-acid) helps reinforce hair structure and create sublimely multidimensional colour.
COLOUR + STRENGTH* + ZERO AMMONIA, ALL IN ONE. Clairol ColourStrong gives you multidimensional colour and reinforces the internal structure of your hair.* What's the secret? The continuous system with colour + bonding has AHA (alpha-hydroxy-acid) in every step: Bonding Primer, Permanent Colour and Bonding Treatment. Zero ammonia + 100% grey coverage. Sublimely multidimensional colour.
*Reinforces hair strength when using ColourStrong full kit vs. ColourStrong colour step only
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