COSMTEK Black Hair Dye Shampoo — 500ml Ammonia-Free 3‑in‑1 Color, Conditions & Covers Gray for Hair and Beard

COSMTEK Black Hair Dye Shampoo is an ammonia-free, 3-in-1 color-depositing shampoo that darkens gray hair and beards while cleansing and conditioning for up to 30 days per application.

This product combines a gentle cleansing base with color-depositing pigments and conditioning botanicals so you can refresh or restore a natural black shade without a separate dyeing step. The formula is free of sulfates, preservatives, and ammonia and includes argan oil, olive oil and turmeric to help smooth hair and reduce frizz. Designed for convenient at-home use, the shampoo works on wet or dry hair (wet is recommended) and is suitable for many hair textures and shades, from light brown to white or gray.

How quickly will I see color results with COSMTEK Black Hair Dye Shampoo?

Most users notice visible darkening after a single use when applied to wet hair and left on for the recommended time. Results depend on your starting hair color, porosity and how long you leave the product on; thicker or coarser hair may need an extra minute or two for fuller coverage.

• Apply to wet hair for the most even color deposit.
• Leave on 5–10 minutes; very thick hair can stay 1–2 minutes longer.
• Rinse thoroughly to avoid residue and uneven tone.
• Expect the effect to last roughly 4–5 weeks; repeat every 15 days to maintain intensity.

Can I use this shampoo on my beard and sensitive facial skin?

The shampoo is formulated for both scalp hair and beard use, but a patch test is recommended for facial skin. Apply a small amount behind the ear and wait 24 hours; if no irritation appears, you can use it on the beard following the same timing guidance as hair.

• Patch test behind the ear 24 hours before first use.
• Apply like normal shampoo, massage into beard, leave 5–10 minutes, then rinse.
• Avoid contact with eyes; rinse immediately if contact occurs.

What conditioning benefits does this color shampoo offer?

This formula includes argan oil, olive oil and turmeric to help smooth the hair shaft and reduce frizz while depositing pigment. Because it combines cleansing, color and conditioning steps, it can simplify your routine and leave hair feeling softer than some traditional dyes.

• Argan oil helps add shine and manageability.
• Olive oil delivers moisture and softness to dry strands.
• Turmeric offers antioxidant-rich botanical support for scalp comfort.
• Free of sulfates and ammonia for gentler handling of color-treated hair.

How long will the color last and how often should I reapply?

Color durability varies by hair type and washing frequency; typically one application lasts about 4–5 weeks. To keep the black tone vivid, apply the color shampoo every 10–15 days or as needed based on fading and new gray growth.

• Results generally hold for 4–5 weeks with normal washing patterns.
• Reapply every 10–15 days for continuous intensity.
• Use less often if you prefer a subtler, gradual darkening effect.

Who is this product for? COSMTEK Black Hair Dye Shampoo suits anyone wanting a low-fuss method to cover gray or refresh a natural black shade without permanent dyes. It works for men and women, scalp and beard, and for people seeking a gentler, ammonia-free alternative that also conditions as it colors. Avoid use if you have known sensitivity to any ingredient; perform the recommended patch test before first full use. Follow the usage notes for best results: apply to wet hair, adjust the amount for hair volume, leave on 5–10 minutes (slightly longer for thick hair), and rinse thoroughly.

Ingredients

Ginseng