Sealants are a protective barrier that is placed over a child's tooth to protect it from decay. Sealants are typically placed over the first and second adult molars soon after they come in. The first molars come in at about age 6 and the second adult molars at about age 12. The reason that baby teeth are not sealed is the fact that they will usually fall out before any serious damage can occur. Sealing of teeth does not typically happen throughout adulthood because adults have have the capacity to brush their teeth well enough to prevent decay. It is the newly erupted adult teeth, in the child, who isn't the best brusher, that we are most worried about. Sealants are quick and painless. They are covered completely by most insurances and they are a tremendous benefit to any child that gets them.