Colgate Phos-Flur Fluoride Solution Anti-Cavity Rinse Mint Aids in the prevention of dental decay. Unique APF formula. Contains fluoride to help prevent decalcification and phosphate to help build strong teeth. Enamel strengthening. Rinsing daily allows the enamel strengthening formula to penetrate your teeth where a toothbrush and flossing cannot easily reach even around your braces. Proven results. Clinically proven to help prevent cavities, and it also helps prevent white spots. #1 recommended fluoride rinse among orthodontists, the experts on proper care for braces. Acidulated phosphate fluoride.