A silicone o-ring is a type of sealing device made from silicone rubber. It has a circular, ring-like shape with a hollow center and is used to create a tight seal between two mating surfaces in various applications. Silicone o-rings are known for their excellent heat resistance, flexibility, and durability, making them suitable for use in a wide range of industries, such as automotive, aerospace, medical, and food processing. They are particularly useful in environments where high temperatures, UV exposure, and chemical resistance are required.