Remove the lid from the container of blackout wax. Pinch off a pea-size amount of wax.
Flatten the wax into the shape of your tooth to ensure proper fit.
Smile and use a paper towel to dry off the tooth your want to blacken. Keep smiling to prevent getting the tooth wet again.
Place the wax on the dry tooth and press it into place. It should adhere to the tooth. If it doesn't, your tooth is not dry enough.
Repeat these steps until you have blacked out all of the desired teeth. The wax should stay in place until it is removed with a toothbrush.