Clairol ColorStrong Permanent Hair Dye Dark Brown 4.0 (Barcelona) — Ammonia‑Free, 100% Gray Coverage

Clairol ColorStrong 4.0 Dark Brown is a permanent, ammonia-free hair color kit that delivers 100% gray coverage and multidimensional, reinforced color using a three-step color + bonding system with AHA.

This at-home hair color pack combines a Bonding Primer, Permanent Color Cream with Activator, and a Bonding Treatment to help deposit reflective pigments while supporting hair structure. The formula is free of ammonia, parabens, and PPD/PTD (do not use if you have a known PPD/PTD allergy). The Barcelona shade is a rich dark brown built to add depth, dimension, and long-lasting coverage in a single application.

How does the bonding system protect my hair during coloring?

The three-step system works like priming, coloring, and sealing — each step contains AHA to help shore up internal hair structure while pigments are applied. The Bonding Primer prepares hair to accept color evenly, the Permanent Color deposits reflective tones, and the Bonding Treatment seals and reinforces the hair fiber.

• Bonding Primer with AHA smooths the surface and reduces uneven uptake.
• Permanent Color Cream + Activator delivers multidimensional pigments.
• Bonding Treatment with AHA locks color and adds final reinforcement.

Will this cover gray hair completely?

Yes — the formula is designed to provide 100% gray coverage in one application for most users. The permanent dye penetrates and deposits color uniformly, helping neutralize visible gray and restore a consistent shade across the hair.

• Permanent color pigments target gray strands for full coverage.
• Reflective tones create natural-looking dimension rather than flat color.
• Instructions and developer provided for proper processing and even results.

Is this product safe for sensitive scalps and free of harsh chemicals?

Clairol ColorStrong is formulated without ammonia and without parabens, and it is labeled PPD/PTD-free; however, it still uses colorants and can cause reactions in people with allergies. Always perform a patch test 48 hours prior to use and follow the included safety directions; do not use if you have a known PPD/PTD allergy.

• Zero ammonia — milder odor during application compared with ammonia-based dyes.
• Paraben-free and no added PPD/PTD in the formula; caution still advised.
• Patch test required to check for individual sensitivity before full application.

What’s included and how do I use the kit for best results?

The kit contains a Bonding Primer with AHA, Permanent Color Cream, Activator, Bonding Treatment with AHA, a pair of gloves, and an instruction leaflet. Follow the step-by-step leaflet: apply primer first, mix and apply the color cream with activator, rinse, then apply the bonding treatment to finish.

• One application kit — everything needed for a single full-head coloring.
• Clear instructions guide timing, mixing ratios, and safety steps.
• Use gloves and recommended timing to achieve even tone and maximum bond support.

Who is this for: Clairol ColorStrong 4.0 Dark Brown is intended for people seeking a permanent, salon-style dark brown at-home color that conceals gray while improving the hair’s look and feel through a bonding system. It suits users who prefer an ammonia-free option with multidimensional pigments and who will perform the required patch test if they have sensitive skin or known hair color allergies.

Ingredients

BONDING PRIMER: AQUA/WATER/EAU, PROPYLENE GLYCOL, HYDROXYETHYLCELLULOSE, QUATERNIUM-80, SODIUM DIETHYLENETRIAMINE PENTAMETHYLENE PHOSPHONATE, PHENOXYETHANOL, MALIC ACID, COCAMIDOPROPYL BETAINE, PEG-40 HYDROGENATED CASTOR OIL, PARFUM/FRAGRANCE, DISODIUM EDTA, DISODIUM PHOSPHATE, POLYSORBATE 60, SODIUM PHOSPHATE PERMANENT COLOR CREAM: AQUA/WATER/EAU, PROPYLENE GLYCOL, ETHANOLAMINE, CETEARYL ALCOHOL, 2-METHOXYMETHYL-P-PHENYLENEDIAMINE, RESORCINOL, SODIUM DIETHYLENETRIAMINE PENTAMETHYLENE PHOSPHONATE, DICETYL PHOSPHATE, 2-METHYLRESORCINOL, SODIUM SULFITE, CETETH-10 PHOSPHATE, STEARETH-200, ASCORBIC ACID, PARFUM/FRAGRANCE, M-AMINOPHENOL, TRISODIUM ETHYLENEDIAMINE DISUCCINATE, XANTHAN GUM, HYDROXYETHYL-3,4-METHYLENEDIOXYANILINE HCL, CITRIC ACID, DISODIUM EDTA, 2,4-DIAMINOPHENOXYETHANOL HCL, 1-NAPHTHOL, SODIUM METASILICATE, N,N-BIS(2-HYDROXYETHYL)-P-PHENYLENEDIAMINE SULFATE ACTIVATOR: AQUA/WATER/EAU, HYDROGEN PEROXIDE, CETEARYL ALCOHOL, CETEARETH-25, SALICYLIC ACID, PHOSPHORIC ACID, DISODIUM PHOSPHATE, DISODIUM PYROPHOSPHATE, SODIUM STANNATE, ETIDRONIC ACID. BONDING TREATMENT: AQUA/WATER/EAU, BIS-HYDROXY/METHOXY AMODIMETHICONE, STEARYL ALCOHOL, CETYL ALCOHOL, STEARAMIDOPROPYL DIMETHYLAMINE, MALIC ACID, GLUTAMIC ACID, PARFUM/FRAGRANCE, BENZYL ALCOHOL, BENZYL BENZOATE, EDTA, HISTIDINE, COCOS NUCIFERA (COCONUT) OIL, SODIUM CHLORIDE, HEXAMETHYLINDANOPYRAN, HEXYL CINNAMAL, LINALOOL, MAGNESIUM NITRATE, TRIMETHYLSILOXYSILICATE, ALOE BARBADENSIS LEAF JUICE, METHYLCHLOROISOTHIAZOLINONE, MAGNESIUM CHLORIDE, METHYLISOTHIAZOLINONE, ASCORBIC ACID, CITRIC ACID, POTASSIUM SORBATE, SODIUM BENZOATE, SODIUM SULFITE