Additives include adhesion promoters or anti stripping agents, stabilizers that improve storage stability, and in some cases polymers, latex, or rubber modifiers for performance. pH control agents are essential for many cationic systems, and salts or buffering agents may be used to control breaking. Some formulations include thickeners to tune viscosity for spraying or coating applications. The choice depends on grade and end use: road tack coat needs predictable breaking and strong adhesion, while waterproofing may prioritize flexibility and film formation. Additives must be compatible with emulsifier chemistry to avoid coagulation or unstable storage.