The effects of various bonding agents on natural rubber-oil palm wood flour (OPWF) composites were studied. Results indicate that the maximum torque increases with increasing OPWF loading and the incorporation of various bonding agents. Compared to the composite without a bonding agent, the incorporation of bonding agents improves the tensile modulus, tear strength, tensile strength, and hardness of the composites. Scanning electron microscopy studies and rubber-fiber interaction measurements indicate that the OPWF-rubber adhesion can be enhanced by the use of bonding agents.