Urethane modified asphalt properties are influenced by several factors, including the type and concentration of urethane used, the base asphalt’s viscosity and chemical composition, temperature during mixing, and curing conditions. Additionally, the presence of additives, such as fillers or plasticizers, can impact performance characteristics like adhesion, elasticity, and resistance to aging. The interaction between urethane and the asphalt matrix also plays a crucial role in determining the final material properties.