Bonding agents are materials used to enhance adhesion between old and new surfaces, especially in concrete and plaster work. They help create a strong, durable bond that prevents separation, cracking, or delamination. Common types include latex-based, epoxy-based, and acrylic bonding agents, each suited for specific applications. These agents are applied to prepared surfaces before adding new layers of concrete, mortar, or plaster. Proper use improves structural integrity and ensures long-lasting repairs or construction. Bonding agents are widely used in construction, renovation, and repair projects, making them essential for achieving reliable performance and maintaining the durability of various building elements.