Dental sealants are used to protect the chewing surfaces of your back teeth (molars and premolars) from cavities. They act as a protective barrier by sealing the grooves and pits where food and bacteria can get trapped and cause decay. This thin, plastic coating is especially beneficial for children and teenagers, as their molars can have deep grooves that are hard to clean effectively. Sealants help keep these vulnerable areas clean and reduce the risk of cavities.