Boats are made of various materials such as reinforced plastic, metal, wood, or plywood. Construction of boats includes several phases from the manufacture of a mold for the hull to finishing with varied materials and chemicals. Therefore, boat building is an industry with exposure to a multitude of chemicals potentially harmful to the skin. The most significant skin sensitizers in the boat building industry are thermosetting plastics such as epoxy, polyester, polyurethane, and acrylic resins or their additives. Construction of wooden boats and cabins includes carpentry tasks. The choice of allergens must be based on the individual exposure, i.e., products used at work must be studied. Patch testing the patient’s own materials is recommendable as commercial allergen preparations are often lacking.