Are you wondering whether can you take aerosol hairspray on a plane or not ? Safety is the major reason you can’t bring a large can of aerosol in your carry-on bag. Aerosols are dangerous, flammable substances, hence they are extremely unsafe for air travel. It’s essential to keep in mind that all liquid, aerosol, and gel products must be stored in containers 3.4 ounces or smaller. Only one plastic zip-top bag per passenger is allowed within carry-on luggage, and it must be able to fit all of the 3.4 ounce containers.