This product contains FD&C food grade food coloring dyes in a minty syrup base. This is an awesome product to finish off a makeup to give it that movie quality. Suggested use is to blot the inside of your mouth with a paper towel or tissue to remove excess saliva. Then simply spray 1 or 2 times directly into the mouth, swish it around to stain the inside of your mouth. Use each colour separately or together to create a monstrous mouth effect. The Zombie Mouth Stain is great for zombies and other monsters. The Werewolf Mouth Stain is great for Werewolves and vampires.The concentration of dye will leave a lasting effect. This product may stain some fabrics. Caution should be taken when spraying directly into the mouth, do not get into eyes. For Professional Use Only.