Waterproof spray is a spray mainly used to prevent clothes and shoes from getting wet due to snow and rain and preventing moisture from penetrating inside. It may also be used for building materials such as roofs, concrete and bricks. Ingredients mainly use fluororesin and silicone resin. Each product has its own characteristics, such as those that repel not only water but also oil, items that do not impair the breathability of clothes and shoes, and environmentally friendly types. The materials that can be used vary depending on the spray, so make sure that they are suitable for the material you want to use.