Yes, modifier dosage has a direct and often strong influence on curing time. Higher polymer content increases viscosity and swelling time, especially for SBS, so the digestion period must be longer to achieve full polymer swelling and phase inversion. At low dosages, curing may stabilize in tens of minutes, while at high dosages it can take several hours. That is why curing time is always optimized experimentally for each formulation, not fixed by temperature alone.