COSMTEK Black Hair Dye Shampoo for Gray Hair — 16.9 fl oz Semi-Permanent 3-in-1 Color & Conditioner

COSMTEK Black Hair Dye Shampoo is a semi-permanent, 3-in-1 shampoo that quickly deposits black color and conditions hair for up to 2–3 weeks without a brush or bowl.

This easy-to-use dye shampoo combines coloring actives with conditioning ingredients so you can restore a darker, fresher-looking tone at home. Formulated for both men and women, the product works on gray, naturally dark, and mixed-toned hair textures. The 16.9 fl oz size is designed for multiple applications, and a pair of disposable gloves is included to make application less messy.

How does this shampoo color hair without traditional dye tools?

The formula deposits semi-permanent pigments while you lather, so there’s no need for bowls, brushes, or complex mixing. It’s applied like a regular shampoo: massage into hair and scalp, leave for the recommended time, then rinse thoroughly.

• Ready-to-use liquid, no developer required.
• 15–20 minute processing time for visible color payoff.
• Includes disposable gloves to protect hands.
• Rinse-out formula minimizes leftover residue.

Will it effectively cover gray hair and how long does the color last?

COSMTEK’s active pigments are designed to adhere to hair cuticles and mask mixed or fully gray strands, restoring a uniform black appearance. Expect the color to remain noticeable through several washes — longevity depends on hair porosity and washing frequency.

• Effective on fine, medium, and thick hair types.
• Typical visibility for about 2–3 weeks before natural regrowth appears.
• Color fades gradually with repeated shampooing.
• Not permanent; touch-ups are simple and repeatable.

Does the shampoo also care for hair while coloring?

Yes — the product blends conditioning agents with coloring molecules to reduce dryness and add shine while depositing pigment. The intent is to protect hair fibers and leave hair feeling softer than many conventional oxidative dyes.

• Conditioning compounds help detangle and smooth the cuticle.
• Designed to reduce the stripped, brittle feel that some dyes cause.
• Leaves a natural-looking sheen rather than a flat, matte finish.
• Suitable for straight, wavy, and curly textures.

How do I use it safely and what should I test beforehand?

Follow the included instructions and always perform a skin sensitivity test 48 hours before first use. Wear the provided gloves, apply to dry or damp hair as directed, time the treatment, then rinse thoroughly and avoid immediate styling with heat on freshly colored hair.

• Patch test recommended 48 hours in advance.
• Use gloves and avoid contact with eyes; rinse if contact occurs.
• Apply evenly to roots and lengths for consistent coverage.
• Repeat application every few weeks to maintain intensity.

Who is this for: COSMTEK Black Hair Dye Shampoo is aimed at men and women who want a fast, at-home way to darken hair and reduce the appearance of gray without a salon visit. It suits people with all hair thicknesses and textures who prefer semi-permanent color with conditioning benefits and who are comfortable performing a simple patch test before first use. This product is a practical option for touch-ups, seasonal color refreshes, or anyone seeking a low-effort alternative to permanent coloring systems.