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No. LetterAgent labels only cover Canada Post Xpresspost parcels under five kilograms, and spray paint is a double hazard: a pressurized aerosol plus flammable contents. Canada Post will not carry it. Here is why the rules are so strict and what to do instead.
A can of spray paint fails the carrier's safety test twice over. The can is pressurized with a propellant gas (Class 2 compressed gas), and the paint and solvents inside are flammable (Class 3 flammable liquids). Either one alone would draw restrictions; together they make the package a pressure vessel full of fuel. Heat a parcel van in summer and the pressure inside the can climbs: burst cans do not just leak, they spray atomized flammable paint, which is about as close to a flamethrower as consumer packaging gets. That is why aerosols sit in their own restriction category separate from liquid paint.
| Paint type | Canada Post | US view |
|---|---|---|
| Aerosol spray paint | Not accepted (pressurized + flammable) | Hazardous: strict restrictions, no air transport |
| Liquid oil-based paint in cans | Not accepted (flammable liquid) | Hazardous: flammable, restricted |
| Water-based latex paint | Still refused: Canada Post treats paints and enamels as dangerous goods | Much easier: latex paint is usually not regulated, but still messy to ship |
The latex row holds the interesting nuance. Water-based latex paint is not really flammable, and US carriers handle it far more leniently. Canada Post's dangerous-goods index nevertheless lists paints and enamels as a category, so do not assume a gallon of latex interior paint sails through a Canadian post office. Even where a carrier permits it, one ruptured paint can destroys every parcel near it, so most shippers skip it anyway.
With a hazmat-trained carrier and ground freight, yes: manufacturers move spray paint by the pallet under dangerous-goods rules with the right labeling, packaging, and placarding. That is a commercial freight operation with trained staff, not a label you print at home. For a person sending one or two cans to a friend, the answer stays no. Spray paint is heavy for its size, cheap to buy locally, and stocked at every hardware store in Canada and the US. Buy the recipient a can at their local store, or just tell them the exact colour code.
The rules do not care how full it is. A "nearly empty" aerosol can still holds propellant gas under pressure, and an unopened can is the most pressurized thing on the shelf. Pressure is pressure: the can does not become safe because you only used a squirt. Likewise, removing the cap to release pressure first is the opposite of a solution: venting a flammable aerosol indoors is a fire and inhalation hazard, and it does not make the can legal to mail.
An aerosol can that fails in a hot trailer does not just leak. The released propellant turns the paint into a fine mist, and that mist is far easier to ignite than the liquid paint was. One burst can coats everything nearby in atomized flammable material while the carrier's crew has no idea what they are dealing with until they open the trailer. This is the scenario the rules are written for: not the normal case, but the hot-day-in-July case, when parcel vans regularly reach temperatures that stress pressurized cans.
This is where the aerosol question and the paint question split. Airbrush and hobby paints in small jars are usually water-based or low-solvent, and without the pressurized can they lose the Class 2 half of the problem. That makes them much more shippable: hobby paints move through ordinary carriers every day. Check the product's classification on its safety data sheet if you are unsure, but a tiny jar of acrylic craft paint is a completely different object from a pressurized can of the same colour. The can, not the colour, is what triggers the restrictions.
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