In order to measure and contrast the results of 3 different remineralizing agents (GC toothmousse, SHY-NM and Chitosan) on shear bond strength of (Fuji II LC) resin modified glass ionomer cement to dentine. Materials and Methods: This research was performed in al Azhar University; faculty of dentistry including 40 sounds freshly extracted primary molars. They were split up into 4 groups, Group (I): (control group) Group (II): (GC Tooth Mousse) Group (III): (SHY-NM) Group (IV): (chitosan). Results: The average shear bond strength was found to be highest in tooth mousse group (10.83±4.16), followed by shyNM (7.81±1.06), then chitosan group (6.96±1.41), with the least value recorded in control (5.19±1.01). NOVA test revealed that tooth mousse group was substantially greater than the 3 other groups (p=0.00). Conclusion: The shear bond strength of Fuji II LC resin altered glass ionomer to dentine was improved when dentine was pre-treated with: CPP-ACP containing paste. 5 % Novamin containing toothpaste. Chitosan in the form of phosphorylated chitosan and amorphous calcium phosphate (Pchi-ACP).