The performance of a polymer modified asphalt emulsion sealer sprayer is influenced by several key process parameters. These include the temperature of the asphalt emulsion, which affects viscosity and sprayability; the polymer concentration, which determines the modification level; and the spray pressure, which influences the atomization of the emulsion. Additionally, nozzle size and spray angle play crucial roles in achieving uniform coverage and effective bonding with the substrate. Proper control of these parameters ensures optimal performance and durability of the sealant.