Based on the statistical analysis, the sample size for this study has been estimated to be 180 subjects. ethical clearance has been obtained from the IRB of the dental school and informed consent obtained from all the participating subjects. This is a spilt mouth study, wherein on side, resin based sealants are placed and on the other side, the ART sealants are placed. All the participating 180 subjects do have a caries free permanent lower 1st right and left molars.