and Rely X U200 (3M ESPE, Neuss, Germany). The measurement of microleakage was performed at 2nd, 4th, 6th and 8th minutes. The data was analyzed by ANOVA and Tukey tests (p<0.05). Results: The best results were obtained in Rely X U200 and Panavia SA Cement groups, while the most leakage was seen in G-Cem Automix and Smart Cem 2 groups (p<0,05). There was statistically significant difference between Rely X U200 and Panavia SA Cement groups compared to the control group (p<0,05). The control group was found to have statistically less microleakage than G-Cem Automix and Smart Cem 2 groups (p<0,05). Conclusion:From the point of microleakage, some self adhesive resin cements used for fiber post cementation were found to be more reliable than the control group material.