Tooth sealants help prevent tooth decay by blocking germs and food particles from settling in the pits and fissures on the chewing surface of the tooth. Applied in minutes, the nonvisible sealant is painted directly on the tooth, requires no anesthesia, requires no drilling or removing of tooth structure, and may last for up to 5 years. Sealants can be especially effective for children who are still learning to brush regularly and well.