To provide a coating product having a characteristic such that a part coated with the coating product is visually recognizable in the first place, and the coating product becomes completely colorless after a while so that the coated product can be conspicuous.

The coating product serving as a transfer tool 1 includes: an adhesive 55 that is a coating object to which a diarylethene-based photochromic compound that produces color when irradiated with an ultraviolet ray of a certain wave length and becomes colorless when irradiated with natural light is added, and which therefore turns into a colorless state from a color producing state when irradiated with natural light; and a light shielding case 2 that is a light shielding container in which the coating object in the color producing state is housed to be kept away from visible light.