🔧 WD-40

WD-40 is a flammable aerosol and is prohibited in both carry-on and checked baggage, so it will be confiscated on the spot with no option to retrieve it. The ban applies to the entire can regardless of how much product is left in it. Do not attempt to bring it — dispose of it before you reach the airport.

WD-40 is prohibited in both carry-on and checked baggage on all commercial passenger flights worldwide. It is classified as a flammable aerosol under ICAO dangerous goods regulations, and this classification is applied consistently by every major aviation authority including the TSA, the UK CAA, EASA, and CASA in Australia.

Aerosol cans produce a very clear, recognisable image on X-ray equipment and are actively screened for in both carry-on and checked baggage. Checked baggage is X-rayed before being loaded onto the aircraft, so a can of WD-40 hidden in a suitcase is likely to be found. The consequences range from confiscation to a missed flight if the bag needs to be pulled and searched.

Buy WD-40 at your destination — it is one of the most widely sold lubricants in the world and is available in hardware stores and supermarkets in almost every country. If you are travelling to a very remote location, ship any tools or lubricants ahead by ground or sea freight, which allows flammable aerosols under different regulations.