Abstract : Background: The marginal integrity of sealing materials is key to the success of any restorative treatment. Microleakage is the primary factor responsible for the failure of Class V restorations. This study aimed to evaluate the occlusal and cervical sealing ability of Glass Carbomer versus Midfil (Conventional glass ionomer) in the restoration of class V cavities with the application of different coating materials. Results: After 72 hrs (3 days); occlusal and cervical micro-leakage of different restorations was statistically significant. GP II revealed the highest significant occlusal micro-leakage (60%), while GP IV showed no micro-leakage. Regarding the cervical micro-leakage, Group II and Group III showed the highest micro-leakage. However, GP IV showed the least significant leakage. After 720 hrs (1 month), the Occlusal and cervical micro-leakage of different restorations was statistically non-significant (P-value = 0.294, 0.113). Conclusions: Carbomer exhibited a higher degree of micro-leakage than Midfil glass-ionomer. Manufacturers’ instructions should be strictly followed using a specific protective coat for each material.