Yes, children and adults can get sealants. For most adults, a dental sealant is a thin plastic coating that is applied to the chewing surface of the teeth, filling small gaps and cracks between the teeth that can harbor decay. When a sealant is placed on a molar, it protects the entire chewing surface. For instance, after applying the sealant to the tops of the teeth, this coating would be thin enough to cover the gum line and canines as well. The teeth on the bottom of the jaw, which require a less severe chewing force than the jaws’ higher molars, are also protected, and further lower the chances of tooth decay.