At-home dental whitening with 16% carbamide peroxide. The Whiteness Perfect family is No. 1 in Brazil. Contains a desensitizing package within the gel composed of: Potassium Nitrate and Fluoride. High water content: keeps teeth hydrated, reducing the risk of developing sensitivity. pH safety: neutral pH. Daily usage time is 3 hours during the day or overnight use. Each 3g syringe provides up to 9 applications.