Asbuton is a natural asphalt from Buton Island, Southeast Sulawesi, in granular form, consisting of mineral aggregates and bitumen. Previous studies have highlighted the potential of Asbuton, particularly the B50/30 type, as a partial binder replacement in asphalt mixtures to optimize hot rolled sheet (HRS) wearing courses. Asbuton B50/30 contains 20–30% natural bitumen, contributing to its role in enhancing mixture stability and deformation resistance. This research is an experimental study aimed at exploring the performance of Asbuton B50/30 as an additive to HRS-WC mixtures, focusing on determining the optimum asphalt content and analyzing the influence of temperature variations during mixing and compaction. The Asbuton B50/30 was added at 10% and 15% levels, with asphalt contents varied from 6.0 to 8.0%. The mixing temperatures were set between 140 and 160 °C, while the compaction temperatures ranged from 90–110 °C. The Marshall test results confirmed that the addition of Asbuton B50/30 improves mixture stability and stiffness, aligning with findings from previous studies on semi-extracted and fully extracted Asbuton applications. The optimum asphalt content with 10% Asbuton B50/30 was found to be 7.36% at a compaction temperature of 110 °C, while with 15% Asbuton B50/30, the optimum asphalt content was 7.64% at a compaction temperature of 90 °C. These findings demonstrate that Asbuton B50/30 can reduce the dependency on petroleum asphalt while maintaining the mechanical performance of HRS-WC mixtures, supporting sustainable material utilization in pavement construction.