RUBBER ELASTOMERS

NBR

Rubber NBR sealing materials

NBR RUBBER – RELIABLE SOLUTION FOR SEALING SYSTEMS

NBR (Nitrile Butadiene Rubber) is a versatile elastomer widely used in the production of sealing elements. Due to its excellent resistance to oils, fuels, and many industrial fluids, NBR is one of the most demanded materials for manufacturing bushings, gaskets, and other sealing components. This material combines durability, elasticity, and cost efficiency, making it an optimal choice for standard sealing solutions across multiple industries.

KEY ADVANTAGES OF NBR RUBBER

OIL AND FUEL RESISTANCE

Excellent resistance to mineral oils, fuels, lubricants, and many aliphatic hydrocarbons ensures reliable sealing performance in hydraulic and pneumatic systems.

GOOD MECHANICAL PROPERTIES

High tensile strength, abrasion resistance, and tear resistance guarantee durability and long service life of sealing elements.

WIDE OPERATING TEMPERATURE RANGE

Standard operating range from –30 °C to +100 °C (short-term up to +120 °C) while maintaining elasticity and sealing integrity under static and dynamic loads.

COST-EFFECTIVE MATERIAL

NBR combines solid performance with affordable production costs, making it one of the most widely used elastomers for seals.

CUSTOMIZABLE FORMULATIONS

Available in various grades with enhanced ozone resistance, wear resistance, or special modifications for demanding applications.

Applications

NBR rubber bushings and sealing elements are used in:
Good resistance
Mineral oils
Aliphatic hydrocarbons (propane, butane)
Water
Fire-resistant pneumatic fluids HFA, HFB, HFC
Adipose and vegetable oils
Diesel petrol
Big amount of dilute acids and bases, salines at room temperature
Average resistance
40% aromat. fuils (leaded fuils)
Biodegradable hydraulic fluid
Silicone oil and grease (oils can cause the decrease)
Low resistance
Aromatic hydrocarbon (toulene, benzol)
Chlorinated hydrocarbones (trichloroethylene)
Brake fluids based on glycol
Fire-resistant pneumatic fluids HFD
Acetone, acetic acid ethyl esters
Properties
Value
Unit
Standard
Hardness at 20°:
85 +/-2
Shore A
DIN 53505
Density:
1,32
g/cm³
DIN ISO 1183-1
100% Modulus:
>10
N/mm²
DIN 53504
300% Modulus:
/
N/mm²
DIN 53504
Tensile strength:
>16
N/mm²
DIN 53504
Elongation at break:
>200
%
DIN 53504
Rebound resilience:
>25
%
DIN 53512
Tear strength:
>6
N/mm²
DIN ISO 34-1
Abrasion:
<90
mm³
DIN 53516
Compression set:*
<10
%
DIN ISO 815-1
Compression set:**
<10
%
DIN ISO 815-1
Compression set:***
<15
%
DIN ISO 815-1
Min. service temperature:
-30
°C
Max. service temperature (short term):
+100 (+120)
°C

*Compression set @ 23°C, 72 hours, 10% deflexion
**Compression set @ 70°C, 24 hours, 20% deflexion
***Compression set @ 100°C, 24 hours, 20% deflexio

All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.

TEST ALPANA QUALITY

We take pride in our seal-making raw materials and are ready to offer samples of our semi-finished products. For testing, we provide our most popular materials, including the Max series of polyurethanes: H-Pur, SH-Pur, XSH-Pur, XH-Pur—as well as rubber bushings: NBR, FKM, H-NBR, EPDM, and MVQ!

Test Alpana quality

Try the quality of our products in action. Order samples and confirm the benefits of ALPANA products.

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