An aluminum boat is a type of vessel constructed from aluminum, a lightweight and durable metal. The siding of an aluminum boat is typically made of 6-letter aluminum alloy, such as ALCOA, which is produced by the Aluminum Company of America. The hull of an aluminum boat is often lined with a 3-letter CAN, or container, to protect it from corrosion. Finally, the exterior of the boat is usually covered with a 4-letter FOIL, or thin sheet of metal, to provide additional protection.