This is pretty strong. Although we clean the ground and the place of the rough grain, it is normal that if the hair is shabby and the hair is still long it is not possible to use it, but this product can be used until the hair becomes short without becoming shabby. This is very satisfying because it can be used for a long time. I use it every day at work, but I have quite a lot. It is good to have more than twice as much as a different one.