This study evaluated the shear bond strength of six dentinal bonding agents and one unfilled enamel bond in association with a microfilled composite resin. Eight specimens were prepared for each product. All the bonded samples were stored at 37 degrees C for 24 hours in a humidifier. Bond strength was measured with a universal testing machine. A statistically significant difference was found between the various products. The new dentinal bonding agents gave the highest bond value.