Bizarre question I know, but I'm traveling to Australia from Canada and want to bring snow in a can for the tree as you can't buy any there. The product is non flammable however is an aerosol can. I hear all international (large) planes are pressurized so it should be fine.. Has anyone else flown with fake snow before? I would have it in checked luggage obviously as I wouldn't need it for the flight ahhaa.
The Canadian Air Transport Security Authority has a master list of allowed and prohibited items. Under "Aerosol spray bottles/cans" it says aerosols are allowed in checked luggage, but limited to 500ml per can and 2 liters total.
So if your can is less than 500 ml, and you have less than 2 liters of aerosols total, then you can put it in your checked luggage.
(Credit: pnuts already mentioned this link, but their answer is deleted.)