Sealants are thin plastic materials that are usually placed on the pits and fissures of chewing surfaces of molar teeth (back teeth) that are susceptible to tooth decay. It protect the molars from decay by not allowing food materials and bacteria to enter the fissures on the chewing surfaces. Application of sealants is very easy and does not require drilling or altering the tooth structure. Generally, sealants are clear or white or slightly tinted and barely noticeable. It is painted on to the tooth once the tooth is cleaned and dried. Sealants form a part of preventive dentistry as long as it remains adhered to the tooth. Application of sealants along with following a proper oral hygiene regime and including fluorides goes a long way in preventing tooth decay.