Dreaming of aluminum means all your success is tenuous and likely to be foiled by someone who throws a wrench into the clockworks because you are not very cautious about taking preventive measures in securing intellectual property. Minimize the possible damages by making the law work for you with proper patents and copyrights on your creative work.
If you are dreaming about aluminum, it typically means that you feel weak, insecure, or vulnerable in your waking life. There may also be something going on in your waking life that has made you feel this way- like a personal loss or insecurity at work.