Since the product has strong adhesion, we recommend using only water. Occasionally, it melts intermittent colors. * Precautions for purchasing hologram products * This product feels completely different from other products like Gold Hologram decal. It feels like a soft hologram because it is coated with a light hologram through additional processing. Please note that products with a smaller decal area (ex. rgScale, etc.) may look weaker in holographic feel.