Get 24-hour relief from painful tooth sensitivity with continued use of Listerine Sensitivity Zero Alcohol Mouthrinse. This uniquely formulated tooth sensitivity mouthwash begins working immediately to shield and protect sensitive areas of teeth. Unlike many oral care sensitivity products that numb the nerve, Listerine Sensitivity mouthwash with Crystal Block Technology works differently by physically blocking 97% of dentin tubules in just six rinses, treating tooth sensitivity at its source. Featuring a refreshing Fresh Mint flavor, this alcohol-free mouthwash reaches virtually 100% of your sensitive teeth areas and gets the hard to reach areas of your mouth. Available in a 500 mL bottle with approximately 1 month of supply. Relief in 2 weeks with continued use. In laboratory studies.