Gyproc BOND-it ‘Bonding Agent” - a unique product that serves as an excellent bond on the RCC background and the internal gypsum based or any other plaster based wall lining. Its unique formula of Polymer, selected sand fillers, additives & polymers makes it coarse and improves its bonding properties.You need not physically develop the surface by hacking or any other methods. Bonding Agent is specially formulated as a plaster bonding agent for pre – treatment of smooth backgrounds. It contains an aggregate to provide a mechanical key.