Dental sealants are thin plastic coatings that cover the chewing surfaces of permanent teeth to prevent tooth decay. Dental sealants are made of acrylic resin and are white or tooth-colored so they blend in with your smile. Dental sealants help prevent cavities in the chewing surfaces of your permanent teeth. They prevent tooth decay by acting as a barrier between the tooth surface and plaque on the tooth. Without dental sealants, tooth decay is the most common chronic childhood disease.Getting dental sealants saves your kids’ teeth from cavities before they start. When cavities form, the enamel on the tooth starts to break down. Dental sealants can protect your teeth from this process.