The aim of this research is to examine the UV aging properties of windshield holder rubber materials used in public transportation vehicles, with a particular focus on the structural changes induced by UV light and their effects on mechanical properties. During the research, various rubber compounds were prepared, and their mechanical properties were measured in both fresh and UV-aged terms. The mechanical tests included measurements of tensile strength, elongation at break, modulus at 100% elongation (M100), and Shore A hardness. Based on the results, it was determined that UV aging significantly impacts the mechanical properties of the rubbers. UV exposure leads to a decrease in tensile strength and elongation at break, while the Shore A hardness increases. These changes can be attributed to free radical formation and the modification of polymer cross-links within the material structure. Comparison of different compounds revealed that some rubber blends exhibit better resistance to UV-induced aging, thereby possessing a longer lifespan. These findings contribute to the development and manufacture of sunlight-resistant rubber products and are beneficial for professionals working in rubber manufacturing and material testing. In summary, UV aging studies help to better understand the long-term behavior of windshield holder rubbers and provide opportunities for optimizing products against the effects of UV light.