The mesh is a type of dye that women apply to their hair; is it permissible to use it, and does it prevent water from reaching the hair?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: The mesh is a type of dye that women apply to their hair for the sake of beautification. The question is: Is it permissible to use it? And is it considered a barrier that prevents water from reaching the hair?

Answer:
I say that leaving the hair in its natural state is better than changing it, unless the hair is disfigured by grayness or a pale color that is not suitable. That is, if the hair has changed from its beauty, there is no harm in dyeing it to beautify it, provided it is not pure black. As for if the hair remains in its beautiful, black natural state, it should be left as is and not changed. As for the mesh, I do not know about it; I do not know its nature. If it hardens on the hair, it is not permissible because it prevents water from reaching it. Yes.