The weather resistance performance of ethyl silicone oil in industrial sealants is mainly reflected in its chemical stability and environmental adaptability. According to reference information, ethyl silicone oil is chemically inert, with its basic molecular structure consisting of ethylsiloxane segments, which endows it with a certain degree of weather resistance. However, compared to materials specifically designed for weather resistance, such as EPDM (ethylene propylene diene monomer), weather resistance may not be its most prominent feature.

Specifically, ethyl silicone oil has relatively poor heat resistance, undergoing significant oxidation at 150°C in the presence of air, leading to a deterioration in electrical properties. Therefore, its long-term operating temperature should not exceed 130°C. This indicates that the performance of ethyl silicone oil may be affected in high-temperature or oxidizing environments, indirectly impacting its weather resistance performance in sealants.

In contrast, EPDM sealing rings, due to their superior weather resistance, chemical resistance, resilience, and temperature adaptability, have become an ideal sealing solution for various harsh environments and applications. Vinyl silicone oil (unlike ethyl silicone oil) is widely used in the modification of plastics, resins, paints, and coatings due to its excellent slip properties, softness, gloss, and temperature and weather resistance.

In summary, ethyl silicone oil exhibits moderate weather resistance in industrial sealants and is suitable for general environmental conditions. However, it may not be as stable as EPDM or vinyl silicone oil in high-temperature or strong oxidizing environments. When selecting sealant materials, a comprehensive consideration of the temperature, chemical exposure, and other requirements of the specific application scenario is necessary.