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No. With Canada Post, nail polish and nail polish remover are non-mailable matter. Canada Post's non-mailable-matter guide lists acetone, naming nail polish and remover directly, under Class 3 flammable liquids, and dangerous goods are refused as non-mailable matter. That covers domestic and outbound mail. Dry alternatives like press-on nails and nail strips ship fine because they contain no liquid solvent.
| Product | Why it's flagged | Canada Post status |
|---|---|---|
| Nail polish | Solvent-based lacquer; flammable liquid | Non-mailable: dangerous goods, Class 3 |
| Nail polish remover (acetone) | Acetone named directly in the Class 3 list | Non-mailable: dangerous goods, Class 3 |
| Non-acetone remover | Still a flammable solvent blend | Non-mailable: dangerous goods, Class 3 |
| Press-on nails, nail strips, files | No liquid solvent at all | Mailable as ordinary goods |
It is the acetone. Nail polish and remover are mostly volatile solvents, and Canada Post's non-mailable-matter guide (the current version, updated May 29, 2026) names "Acetone (nail polish and remover)" word for word in its Class 3 flammable liquids index. Class 3 covers flammable liquids generally, alongside gasoline, thinners, and alcohols. The rule that follows is blunt: dangerous goods, as defined by the Transportation of Dangerous Goods Regulations, are non-mailable matter, and Canada Post will not accept packages containing them. The only standing exception in that document is for lithium batteries handled under the ABCs of mailing rules. Nail polish gets no such carve-out.
Do not test this. Canada Post states that depositing an item means you represent it does not constitute non-mailable matter, and you are solely responsible for that representation. If a package leaks, the solvent can damage other people's mail and sorting equipment, and the liability sits with you. Internationally it is worse: if an inbound item is found to be non-mailable, Canada Post removes it from the mail stream immediately, there is no option to return it to sender, and the legislative authority destroys it. A seized bottle of polish is the best case; a leak in transit is the bad one.
There is exactly one narrow door in the Canada Post document: contract customers and Solutions for Small Business cardholders can access an expanded acceptance program for limited quantities, excepted quantities, and lithium batteries. That is a business shipping program with its own enrollment and packaging rules, not something available at a retail counter or through a single parcel label. If you run a beauty-products business and ship polish regularly, that program is worth investigating. For everyone else sending a bottle to a friend, it is not a practical route.
Anything without a liquid solvent. Press-on nails, adhesive nail strips, nail files, buffers, cuticle pushers, and nail art stickers are ordinary goods and ship like anything else. Gel polish is still polish: the solvent chemistry is what matters, not the marketing. And note the scope of this answer: LetterAgent sells Canada Post Xpresspost labels (Canada-only, 5 kg max), and a label does not change what Canada Post accepts. Non-mailable stays non-mailable no matter where the label came from.
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