Sealants are a thin plastic/resin coating that is “painted” onto the chewing surfaces of permanent molars and premolars. They act as a barrier, protecting your teeth against decay-causing bacteria. The sealant bonds into the grooves in your teeth forming a protective shield over the enamel of the tooth. Sealants have proven effective at preventing cavities in adults as well as children but are most commonly used on children. Ask your dentist whether sealants are a good choice for you and/or your family.