Bonding agent is a material with low viscosity which. Bonding agents were developed for use with composite resins. increased mechanical retention of the restoration. Bonding Agent itself is an emulsion polyvinyl acetate bonding agent. Usually a bonding agent is added to cement to increase the bond strength between old and new concrete. Bonding Agent suitable for all types of Portland cement or sulfate resisting cement, high alumina cement and gypsum plaster.