f there is one universal truth about dyeing your hair at home, it’s that it’s usually a messy, smelly hassle. But when those stubborn gray roots start showing around my hairline and ears, I need a solution that is fast and effective.
I keep seeing these “shampoo hair dyes” popping up on Amazon, claiming to color, cleanse, and condition all in one step—in just 20 minutes. Sound too good to be true? I thought so too.
So, I bought the viral Cosmpro Black Hair Dye Shampoo 3 in 1 for Women/Men to put it to the ultimate test.
I filmed the entire process—from unboxing to the final rinse—so you can see exactly how it works. Watch the video below for the live demo, and keep reading for my full written breakdown, tips, and final verdict.
What is Cosmopro 3-in-1 Hair Dye Shampoo?
Unlike traditional box dyes that require mixing developers and enduring harsh chemical fumes, this product is designed for simplicity. It claims to be a three-in-one solution: It dyes the hair black, shampoos it clean, and conditions it for shine, all without ammonia or parabens.
The biggest draw for me? The promise of covering resistant gray hair quickly without the overwhelming chemical smell as well as multiple applications in one bottle.
The Application Process: Easier Than I Thought
As you can see in the video, the kit comes with the bottle, a pump dispenser, 2 disposable capes and gloves.
Here is the step-by-step breakdown of how I used it:
Step 1: Prep. Make sure your hair is dry. Put on the provided gloves. This stuff is potent and will stain your hands and nails instantly if you aren’t carefully.
Step 2: Pump & Apply. The pump was a little tough to get started (I had to really muscle it!), but once it got going, the product came out easily. It looks clear at first but quickly turns dark as it oxidizes.
Step 3: Lather. I applied it generously, focusing heavily on my problem areas—the hairline, around the ears, and the roots. You massage it in just like a regular shampoo until your whole head is covered in a thick, dark lather.
Step 4: The Wait. The instructions say 20-25 minutes. I left mine on for about 30 minutes after reading several tips to ensure those stubborn grays absorbed the color.
The Final Verdict: Did It Work?
After 30 minutes, I rinsed my hair until the water ran clear.
The Feeling: Immediately, I noticed a difference compared to standard dyes. My hair didn’t feel like straw. It actually felt incredibly soft and detangled while wet, proving that the conditioning element of the Cosmopro Shampoo actually works. Furthermore, there was absolutely zero chemical smell—it just smelled pleasant and clean.
The Coverage Results: Once I blow-dried my hair, the results were undeniable. It worked.
The coverage on my gray roots was excellent. It resulted in a very natural-looking jet black. It didn’t look “inky” or fake; it just looked healthy and shiny.
Pros & Cons At A Glance
If you are on the fence about trying this, here is my quick summary:
Pros:
- Incredible Gray Coverage: Even on resistant roots.
- Speed: Done in under 30 minutes.
- No Harsh Smells: Ammonia-free and pleasant scent.
- Conditions Hair: Leaves hair feeling soft, not damaged.
- Convenience: No mixing bowls or brushes needed.
Cons:
- Staining: It stains skin very easily, so be precise and wear the gloves.
- The Pump: It took some serious effort to get the pump working initially.
Would I Recommend It?
Absolutely. If you are looking for the easiest possible way to cover gray hair at home without damaging your hair with harsh chemicals, the Cosmopro Black Hair Dye Shampoo is a total game-changer. It’s definitely going into my regular rotation for root touch-ups. It claims to last 4 weeks, I’m only on my second week and I’ve had no fading yet; however, I only wash my hair 2 – 3 times per week. One other note, it did not transfer to my pillow case after coloring (that was a plus)
Ready to banish your grays in 30 minutes?
CLICK HERE TO SHOP THE COSMOPRO HAIR DYE SHAMPOO ON AMAZON
Full Transparency: Everything used in the video is something I purchased myself and use constantly in my own home. I am an Amazon Influencer share my affiliate links below, so I earn a small commission on qualifying purchases. It really helps support my channel and allows me to keep creating content for you!
