B70 is a type of synthetic rubber known for its excellent resistance to heat, aging, and chemicals. It is commonly used in various applications, including automotive parts, seals, and gaskets. The material's durability makes it suitable for environments that experience extreme temperatures and harsh conditions. This rubber is part of the broader category of butadiene rubber, which is derived from the polymerization of butadiene. B70 is often favored in industries that require reliable performance and longevity, contributing to the overall efficiency and safety of products made from it.