Supposed to be used as a pre-treatment for the No.3 Hair Perfecter, but honestly, I've tried the No.3 with and without this and there's no difference. The spray nozzle also wastes a lot of product. I am using what's left of this as a detangling spray, which it actually works pretty well for, but it is not needed to see results from your Olaplex treatments.

Tried it along with no. 3 which I adore and don’t see this much difference. I’m not actually sure if you gotta use it for better effects. Maybe no. 3 is enough 

I love Olaplex n.º 3 and n.º 6, and have been using them for awhile. But this, this is pretty much expensive water in a spray bottle. I've tried the n.º 3 treatment with and without this one (just by wetting my hair) and the result is the same, so I guess this is just a placebo product. I won't buy it again (and honestly don't recommend you do either).

I pair this with number 3. I have been using them as my hair is quite frizzy and these tames them really well.

I have bought this over and over again and will continue buying it. I pair it with N.3 once or twice a week and my hair ends have not been damaged from my recent change of color. Highly recommend