COSMTEK Black Dye Shampoo - 3-in-1 Gray Coverage for Hair & Beard (Ammonia-Free, 500ml)

COSMTEK Black Dye Shampoo - 3-in-1 color solution for hair and beard

CosmTek presents a color-depositing shampoo designed to refresh rich black tones between full dye sessions. The 500 ml bottle offers a convenient, ammonia-free option that works across different hair types and even on facial hair, delivering a cohesive, natural look. The formula blends a natural herbal profile with nourishing oils to help the hair feel smoother and look more vibrant after each wash.

The blend includes Argan Oil, Olive Oil, and Turmeric to promote manageability and shine, while helping to reduce frizz after application. This 3-in-1 product can be used on white, gray, or light brown hair to enhance a deeper black, and it can also darken beards for a unified appearance. The lightweight formula deposits pigment rather than lifting existing color, giving you a subtle, even result that blends with your base shade.

What you get

• Color-depositing care that can improve gray coverage and darken lighter strands
• Beard darkening option for a cohesive look with scalp color
• Ammonia-free, preservative-free, and sulfate-free formula for gentler cleansing
• Natural herbal blend paired with Argan and Olive Oils for smoother texture and reduced frizz
• Easy 5-10 minute application that fits into a quick routine
• Lasting color: typically 4-5 weeks per use with maintenance every ~15 days

How to use

• Apply to wet hair as you would with a regular shampoo.
• Leave on for 5-10 minutes to allow pigment to deposit.
• Rinse thoroughly and style as usual. For ongoing color, repeat every 2 weeks.

Real-life use cases

Between salon visits, this shampoo helps gray roots blend with the overall tone, brightens dull strands, and harmonizes beard color for a more unified look. The formula is designed for everyday use with a light herbal aroma that won’t overwhelm.

Maintenance and tips

• Avoid over-washing to extend color life and reduce fading.
• Pair with a color-safe conditioner for added slip and shine without heavy buildup.