Clairol ColourStrong Permanent Hair Dye 4.0 Dark Brown Biotin Discontinue use and consult your

Discontinue use and consult your physician immediately in case of an allergic reaction

To reproduce a car-like experience in the safety of the home

The gentle yet potent formula also stars Protein Peptides and Hyaluronic Acid which work together to improve hydration

Hippophae Rhamnoides (Seabuckthorn) Fruit Oil

Clairol ColourStrong Permanent Hair Dye 4.0 Dark Brown Biotin Discontinue use and consult yourProduct Information Colour & Strength with 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