NBR Compounds — Oil-Resistant
A nitrile rubber (NBR) compound formulated for excellent resistance to mineral oils, fuels and greases. It is the standard choice for seals and technical parts permanently exposed to petroleum products, in the automotive industry and industrial machinery.
Technical Specifications
Indicative values, typical for NBR compounds. Exact parameters are confirmed on the recipe approved in Geola Prod's in-house laboratory.
| Parameter | Value |
| Elastomer base | NBR (nitrile rubber) |
| Shore A hardness | 40–90 |
| Working temperature | -40°C … +120°C |
| Tensile strength | ≥ 10 MPa |
| Elongation at break | ≥ 250% |
| Density (indicative) | 1.20–1.45 g/cm³ |
| Oil/fuel resistance | Excellent |
| Ozone/weathering resistance | Poor |
| Reference standards | SR ISO 37, ISO 48-4, SR ISO 1817, ISO 1431 |
Applications
Hydraulic & Pneumatic Systems
Seals and gaskets for hydraulic and pneumatic systems permanently exposed to mineral oils.
Automotive Industry
Seals and technical sleeves in direct contact with fuels and lubricants.
Industrial & Agricultural Machinery
Sealing components where oil resistance is the primary technical criterion.
Frequently Asked Questions
What is NBR rubber and why does it resist oils well?
NBR (nitrile-butadiene rubber) is a copolymer whose acrylonitrile content gives it high resistance to mineral oils, fuels, greases and aliphatic solvents. The higher the acrylonitrile content, the greater the oil resistance, at the expense of low-temperature flexibility.
What is the working temperature range for NBR?
Our NBR compounds typically cover the range from -40°C to +120°C. Above this limit, the material degrades faster; for higher temperatures we recommend EPDM or silicone compounds.
Does NBR resist ozone and prolonged outdoor exposure?
We do not recommend prolonged exposure to sun, ozone or weathering without additional protection in the recipe — NBR has poor ozone resistance. For outdoor applications, EPDM is a more suitable choice.
What Shore A hardness can I order for an NBR compound?
We formulate NBR compounds in the 40–90 Shore A range, depending on the application and the mechanical demands of the final part.
Other Rubber Compounds
Request a Quote for NBR Compound
Specify the application, the oil/fuel type and the hardness required — we will formulate the optimum recipe for you.