A sealer fills the microscopic gaps and the irregularities of the root canal system and bonds the core material to root canal walls. Sealers routinely used in endodontics do not meet one or more requisites of ideal root canal sealers. Aim: To evaluate and compare the apical sealing ability of AH plus, EndoSequence BC RCS, and EndoREZ sealer using stereomicroscope. Materials And Methods: 75 freshly extracted human permanent maxillary anterior teeth with fully developed root apices were selected for the study. Decoronated samples wereprepared using Rotary Pro taper files andwere randomly divided into 3 groups of 25 samples each and obturated by lateral condensation and 6% gutta percha and respective sealers  and then stored at 37◦ C for 24 hrs.The roots were coated with nail varnish until the apical 2 mm and  then be suspended in 1% methylene blue for 72 hours. Then the roots were rinsed for 15 minutes under tap water and  were split longitudinally parallel to the long axis with a diamond disc using a water coolant and then horizontally markings were made at 2, 4 and 6 mm from the apex. The depth of dye penetration was examined under stereomicroscope and associated microleakage with respective groups was calculated. Results: Vertical dye penetration in all three groups showed dye penetration and was not  statistically significant. Horizontal dye penetration at predetermined levels in all three groups  was statistically significant. Conclusion: Bioceramic sealer sealed the root canal better compared to AH Plus Sealer but the hermetic seal obtained was equivalent to that of EndoREZ. Within the limitations of this in–vitro study a better three dimensional sealing was achieved with both EndoSequence BC Sealer and EndoREZ.