Aim: To evaluate the microleakage using routine irrigating solutions on Mineral Trioxide Aggregate used as a perforation repair material. Study Design: Pulp chambers of 80 extracted human molars were accessed, after which standardized diamond bur–cut perforations were created in the center of the pulp chamber floor. Then the perforations in all the samples were repaired with MTA and irrigated with irrigating solutions viz NaOCl, EDTA & MTAD. The samples were coated with a nail varnish and allowed to dry. The samples were then submerged in 2% methylene blue dye for 1 week at room temperature and then analyzed under a microscope. Results: EDTA and MTAD showed the most microleakage Conclusion: Microleakage of the dye between MTA and the dentinal wall was seen in all groups irrespective of the irrigating solutions used.