I have used this product on my upper lip when going through a stage where my skin was to sensitive to wax. A great basic formula, helped lighten the hairs on my upper lip so they were only noticeable when very close to the face. Helped a lot being able to make hairs lighter as another option while waiting for my skin to be less sensitive to hair removal methods.
Skin didn't feel irritated in any way afterwards and it's very quick to use which was great!
I've used this a few times and it is just far too potent for my skin. I am always left red and irritated.
You simply mix together then apply to the hair you want to lighten and let it sit. 5 minutes was more than enough for me before I felt a burning sensation, so be careful!
Definitely do not recommend if you have sensitive skin. Do a patch test first.