Nitrile butadiene rubber, often abbreviated as NBR, is a synthetic rubber made from the copolymerization of acrylonitrile and butadiene. It is known for its excellent resistance to oils, fuels, and chemicals, making it a popular choice for automotive and industrial applications. NBR is commonly used in seals, gaskets, and hoses due to its durability and flexibility. This type of rubber also performs well in a wide range of temperatures, from very low to high heat. Its properties can be modified by adjusting the ratio of acrylonitrile to butadiene, allowing manufacturers to tailor it for specific uses.