Elmex Opti Email Professional mouthwash Protects against loss of tooth enamel With tin chloride and amino fluoride Olafluor Strengthens tooth enamel It makes the enamel more resistant to the erosive attack of acids 400ml Elmex dental solution is indicated for patients at risk of erosion. Regular use of Elmex® EMAIL PROFESSIONAL mouthwash strengthens tooth enamel and makes it more resistant to the erosive attack of acids. Elmex® EROSION PROTECT dental solution works by forming a tin-rich layer on the surface of the tooth. In a second phase, in the event of erosive acid attack, the tin is integrated into the outermost dental layers.