Dental sealants are thin, protective coatings applied to the chewing surfaces of teeth, primarily the back molars. They help prevent cavities by sealing off grooves and pits where food particles and bacteria can accumulate. Sealants are especially beneficial for children, as their permanent molars typically emerge around ages 6 and 12. The application process is quick and painless. A dentist cleans the tooth surface, applies a special gel to help the sealant bond, and then cures it with a light. With proper care, sealants can last several years, providing an effective barrier against decay.