Dental sealants are a great way to protect your child's permanent teeth from cavities. They are a clear and protective coating that is applied to the biting surfaces of the child's molars (back teeth). Sealants protect the tooth from getting a cavity by shielding against bacteria and plaque. Sealants are most commonly placed on children's permanent back teeth because they are more prone to cavities. Most insurance companies pay for sealants for children however, coverage for adult sealants is usually not covered.