Sealants are basically resins which are flowed into the grooves of teeth (back teeth) to help reduce the likelihood of cavities. They can be placed on primary and / or permanent teeth (molars and premolars). The new generation of Sealants are themselves fluoride releasing for yet added benefit. Any posterior tooth that has grooves which are deep and has no evidence of caries or an existing filling, is a candidate for a sealant. There is no age limit at which a person can have sealants placed. Many insurance companies however, will only pay for Sealants through age 14.