Sealants help prevent decay on the biting surfaces of your chewing teeth. A tooth colored acrylic is applied onto the surface of the tooth, sealing the grooves and creating a barrier to protect the enamel. Sometimes, brushing and flossing aren’t enough to remove debris that can cause decay. Sealants help protect teeth from excess decay, and last for several years before reapplication is needed. Sealants can be applied to both children and adults.