Cork Rubber is a combination of milled cork grain and synthetic rubber. A combination of first grade granulated cork and rubber polymer such as Neoprene, natural rubber, silicone, nitrile, EPDM are held together with glycerin-glue applied under heat and pressure to form 70% cork- 30% rubber – a highly resilient and compressible material used in gasket applications. It has great working temperatures and offers great resistance to fuels, grease, and oils. With the ability to withstand sideways flow, the cork-rubber is also impact resistant, shock absorbing and resistant to fluid penetration. Temperature ranges: 40°F to +250°F; typically used in the electric and automobile industries.