Most blue decals and peel-and-stick murals are made from vinyl.
Decals described as splash-resistant, moisture- or steam-resistant, and tolerant of humidity and light splashes are suitable for kitchens, bathrooms, and laundry rooms.
They are intended for smooth, flat surfaces such as ceramic, glass, tile, backsplashes, mirrors, and smooth painted walls. Some vinyl decals also list compatibility with metal, wood, and certain plastics—check the product details.