The aim of this study was to evaluate the effect of curing mode on bond strength of two resin cements (RelyX Ultimate and GCem LinkAce). Occlusal dentin surfaces of 40 human molars were exposed and pre-polymerized resin disks were cemented, which were allowed to self-cured or light-activated (n=10). Teeth were sectioned to obtain specimens for microtensile bond strength. Results suggested that the light-activation increased the bond strength only for RelyX Ultimate.