cosmpro Dark Brown Hair Dye Shampoo 3-in-1 500ml — Semi-Permanent Gray Coverage & Conditioner

This product combines color, cleansing, and conditioning in one bottle so you can refresh your hair color at home without a brush, bowl, or lengthy salon appointment. Formulated to deposit color onto the hair surface rather than penetrate the cortex, it provides an easy, lower-commitment way to even out grays and refresh dark brown shades that typically last 3–4 weeks depending on wash frequency and hair porosity. A patch test is recommended before first use.

How do I use this shampoo for best gray coverage?

Use the shampoo on clean, damp hair as you would a regular shampoo, wearing gloves to avoid staining hands. Lather through the lengths and focus on gray-prone areas, then leave it on for 15–20 minutes—20 minutes for full gray coverage—and rinse thoroughly.

• Apply to damp hair; do not mix with other products.
• Leave 15 minutes for tone refresh, 20 minutes for denser gray coverage.
• Rinse until water runs clear; repeat weekly as needed.
• Perform a skin allergy test 48 hours before first use.

Will this damage my hair or scalp?

This formula sits on the hair's outer layer rather than permanently altering the hair shaft, which reduces chemical stress compared with permanent dyes. It also contains conditioning ingredients so hair feels softer after use, but avoid application on broken skin and follow the allergy test guidance.

• Semi-permanent action that coats rather than penetrates the cortex.
• Includes conditioning agents to help smooth and detangle.
• Avoid contact with eyes and wounds; follow safety instructions.

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

Expect visible dark brown color for about 3–4 weeks; longevity varies by hair type and how often you shampoo. For most users, touching up once every 2–4 weeks maintains even coverage and a fresh appearance.

• Color persistence: commonly 3–4 weeks.
• Reapply every 2–4 weeks based on wash frequency.
• Use milder shampoos and cool water to extend color life.

Can anyone use this product and who should avoid it?

This product is designed for adults seeking temporary to short-term gray coverage and darker brown tones without a salon visit. It is not suitable for people with known sensitivity to hair dye ingredients, those under 16, or anyone with scalp wounds or recent chemical treatments without professional advice.

• Ideal for adults wanting quick gray coverage and tone refresh.
• Not recommended for individuals with dye allergies or scalp injuries.
• Perform a patch test 48 hours before first full application.

Who is this for: cosmpro Dark Brown Hair Dye Shampoo 3-in-1 is aimed at women and men who want an easy, time-saving way to mask grays and revive natural dark brown color at home. It suits people seeking a lower-commitment alternative to permanent dyes, caregivers or family members wanting a simple color solution for elders, and anyone who prefers a combined shampoo-plus-conditioner color application for quick touch-ups between salon visits.