Butyl Rubber


Butyl Gasket

Butyl Rubber is an extremely versatile material. Butyl Rubber is a copolymer of isobutylene and a very small amount of isoprene, both polymers are distributed throughout the polymer chain randomly. It was first synthesized in 1937 at Standard Oil, now formally ExxonMobil Chemical. Shortly after, in 1943 Butyl Rubber was commercialized. There are many favorable properties that Butyl Rubber has to offer, one of the most discussed properties of Butyl Rubber is the low permeability to air/gases and vapors. This makes it good for applications requiring an airtight seal, such as tires, vibration dampening, and construction sealants. Butyl rubber is also good for resistance to oxygen, sunlight, ozone and heat. The temperature range with Butyl is very wide; it typically ranges from ­60F to 250F. The ASTM D1418 designation for Butyl Rubber is IIR. The designation for Butyl Rubber is typically under AA for ASTM D2000.

NEDC can supply Butyl Rubber in many forms, including but not limited to: strips, extrusion(cord stock), sheets, waterjet cut parts, die­cuts, molded parts and other forms. In sheet stock form, Butyl Rubber is typically provided in the standard thickness of .020”, .032”, .062”, .125”, .250” and .500”. Because of NEDC’s unique capabilities, NEDC is able to manufacture custom thicknesses of Butyl Rubber and convert them under the same roof. NEDC is a leading supplier and distributor of butyl rubber waterjet and die cut parts.