| Material | Abbreviation | Chemical Name | Other Trade Names | ASTM 2000 Designations |
| Styrene-butadiene | SBR | Styrene-butadiene rubber | ® | HK |
Styrene-Butadiene (SBR) is a copolymer of styrene and butadiene.
SBR compounds have properties similar to those of natural rubber. SBRs primary custom molded application is the use in hydraulic brakes system seals and diaphragms, with the major of the industry usage coming from the Tire Industry.
SBR features excellent resistance to brake fluids, and good water resistance
