Dental sealants are thin, protective coatings applied to the chewing surfaces of molars and premolars to help prevent tooth decay. Made from safe plastic materials, sealants are applied quickly and painlessly. They act as a barrier, blocking food particles and bacteria from settling into the deep grooves of teeth—areas that brushing and flossing often miss. Sealants are especially beneficial for children and teens, offering added protection during years when maintaining proper oral hygiene can be more challenging.