This is conditioner meant to stop colour from fading fast. I used this on a semi dye over bleached hair to help it stick and not fade and it worked fantastically. The underneath of my hair was faded orange, i dyed it using a medium brown that naturally came out quite dark almost black to start with and I used the conditioner twice from rinsing out the dye and my hair stayed that freshly dyed dark look for a month before it started to lighten. I've used it on my bleached streak and noticed it keeps the freshly dyed look a bit longer.
I think it is great, the only bad thing i have to say about it is the smell, but other than that i am impressed it does what it says π