Dental sealants are thin, protective coatings applied to the chewing surfaces of molars and premolars. They are made from a plastic material and help prevent cavities by sealing the grooves and pits where food particles and bacteria can accumulate. Sealants are especially beneficial for children, as their teeth are more prone to decay. The application process is quick and painless. A dentist cleans the tooth surface, applies an acid solution to help the sealant bond, and then paints the sealant onto the tooth. Once it hardens, it provides a durable barrier against cavities for several years.