FDA silicone O-rings have been approved by the U.S. Food and Drug Administration (FDA) for use in food and medical applications. These O-rings are made from a high-quality silicone material that is safe for use in contact with food and medical products. They are also resistant to high temperatures, chemicals, and extreme weather conditions, making them suitable for use in a wide range of industries. These O-rings are also flexible and have a good memory, which helps them to maintain a seal even under high pressure or extreme temperatures. They are commonly used in food processing and pharmaceutical industries where it is important to maintain cleanliness and safety.