Can I Bring Hair Gel Onto An Aeroplane?

The following rules apply to all liquids, gels, and aerosols carried through  security checkpoints.

1. All liquids, gels and aerosols must be
   in three-ounce or smaller containers. Larger containers that are
   half-full or toothpaste tubes rolled up are not allowed. Each container must be three ounces or smaller.
2. All
   liquids, gels and aerosols must be placed in a single, quart-size,
   zip-top, clear plastic bag. Gallon size bags or bags that are not
   zip-top such as fold-over sandwich bags are not allowed. Each traveler can use only one, quart-size, zip-top, clear plastic bag.
3. Each
   traveler must remove their quart-sized plastic, zip-top bag from their
   carry-on and place it in a bin or on the conveyor belt for X-ray
   screening. X-raying separately will allow TSA security officers to more
   easily examine the declared items.

There are exceptions for baby formula, breast milk

Looking at this article I think you may have to purchase them in the secure area of the airport, rather than bringing it from home.

Hope this helps

PTL x