Several factors influence SBS modified asphalt shingles in asphalt or bitumen modification systems. Key factors include the quality and type of SBS polymer used, the ratio of SBS to asphalt, the processing temperature during production, and the curing time. Additionally, the compatibility of the asphalt with the SBS, the presence of additives, and the environmental conditions during application and service life also play crucial roles in the performance and durability of the shingles.