If you’ve ever wondered what are dental sealants, you’re not alone. Dental sealants are thin, protective coatings applied to the chewing surfaces of your back teeth—mainly molars and premolars. These areas tend to have deep grooves where food particles and bacteria can hide, making them more prone to cavities. A sealant on a tooth acts like a shield, blocking out harmful debris and reducing the risk of decay before it even starts.