If your dentist determines Zoom! is right for you, they will being by isolating your lips and gums. Next, they will apply the Zoom! whitening gel, which contains specifically formulated, pH balanced hydrogen peroxide, on the teeth.To activate the Zoom! whitening gel, your dentist applies a specially designed, low-heat light that penetrates the teeth. During this process, the hydrogen peroxide in the gel attaches to stained molecules on the teeth, weakening them. This allows oxygen to enter the tooth enamel and lighten them.Your dentist will repeat this twenty-minute gel application two more times for the Zoom! teeth whitening system to reach its full effect.