About Traveling With Aerosols
When traveling, most people need to bring at least one liquid with them.
Potentially, that liquid may be in the form of an aerosol. Aerosols are allowed on planes, but only if they are personal care items or toiletries. Things like hairspray, deodorant, shaving cream, perfume, sunscreen, and insect repellent are all considered personal care items and are allowed on the plane.
Aerosols, like all liquids, are allowed in your carry-on as long as they are 3.4 ounces or smaller. All liquids must be able to fit into one clear, sealed, 1-quart zip top bag. Full-sized aerosols can be brought on the plane as well, as long as they are stored in your checked luggage.
Certain aerosols, no matter the size, are only allowed in checked bags, such as electronics cleaners. Flammable aerosols are never allowed on planes. Things like WD-40 and spray paint are flammable and cannot be carried on or checked.
All aerosols should have a lid that is not easily removed to prevent the product from accidentally spraying during the flight.
Aerosols are airtight and should not leak during the flight. However, as you would do with your other liquids, it is best to keep them in sealed plastic bag (which you have to do if they are in your carry-on luggage anyway), or wrap them in a towel. This protects the rest of your packed items just in case the lid comes off and some product leaks out.
TSA regulations are subject to change. If you are unsure about whether a certain product or item (aerosol or not) is allowed on a plane, it is best to check or—if possible—do not bring it with you and purchase it once you reach your destination.
