SHAFAQNA – The Grand Ayatollah Sistani answered questions about trimming eyebrows and using hair gels for men.
Question: Is trimming eyebrows (removing some hair from eyebrows) for men Haram?
The Grand Ayatollah Sistani: This in itself has no problem.
Question: What is the ruling about rubbing gel to hairs on the head?
The Grand Ayatollah Sistani: There is no problem, but if it prevents water reaching the hairs on the head, or there is a probability that it may prevent it, at the time of Wudhu, for anointing head, it must be removed from the Wajib area (the gel must be removed from the area of the head where it is Wajib for water to reach at the time of Wudhu).
Source: PERSIAN SHAFAQNA