Bio-Diesel Grade Nitrile Sheet — 70 Durometer
Bio-Diesel Grade Nitrile Sheet — 70 Durometer is a 70 Shore A nitrile butadiene rubber (NBR) sheeting compound formulated for verified compatibility with bio-diesel fuel blends including B20 and B100. The material delivers a tensile strength of 1000 psi and 300% elongation across a service temperature range of -40 to +220°F. This grade is produced in the USA and is suited for fuel system sealing applications requiring a harder, more compression-resistant elastomer profile.
Key Properties
- Hardness, Shore A: 70 ± 5 (ASTM D2240)
- Tensile Strength: 1000 psi (ASTM D412)
- Elongation: 300% (ASTM D412)
- Service Temperature Range: -40 to +220°F
- Bio-Diesel Compatibility: Compatible with Bio-Diesel B20 & B100
- Polymer: NBR (Acrylonitrile-Butadiene Rubber)
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- Specifications
- Applications
- General Info
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Physical Properties
| Property | Value | Test Method |
| Hardness, Shore A | 70 ± 5 | ASTM D2240 |
| Tensile Strength, psi | 1000 | ASTM D412 |
| Elongation, % | 300 | ASTM D412 |
| Temperature Range | -40 to +220°F | — |
- Bio-diesel fuel system gaskets and flange seals
- B20 and B100 compatible fuel line sealing components
- Fleet and commercial vehicle fuel system seals
- Fuel storage tank and dispensing equipment gaskets
- General petroleum and bio-fuel fluid containment seals
Common industries: Transportation, Fleet Maintenance, Agriculture, Fuel Distribution, Industrial Equipment.
Bio-Diesel Grade Nitrile Sheet — 70 Durometer is a firm-durometer nitrile butadiene rubber sheeting designed for sealing applications in bio-diesel fuel systems, including those operating on B20 blends and full B100 bio-diesel. At 70 Shore A, this grade provides a higher resistance to compression and deformation than softer nitrile grades, making it well suited for flange gaskets, fuel system seals, and components where dimensional stability under load is a priority.
The material operates across a wide service temperature range of -40 to +220°F, giving it reliable performance in cold-start conditions as well as elevated-temperature fuel system environments. With a tensile strength of 1000 psi and elongation of 300%, it maintains mechanical integrity through installation and service cycles typical of fuel system sealing applications. The compound is manufactured in the USA.
What differentiates Bio-Diesel Grade Nitrile Sheet — 70 Durometer from the 60 Durometer grade?
The 70 Durometer grade offers a firmer durometer (70 Shore A vs. 60 Shore A) and extends the low-temperature performance to -40°F, five degrees lower than the 60 Durometer grade's -30°F lower limit. The higher hardness provides greater resistance to compression and mechanical deformation under load, making it the preferred choice where tighter dimensional control and stiffer sealing force are required.
Why is hardness important when selecting a nitrile sheeting grade for fuel system applications?
Durometer directly affects how a gasket or seal responds to compressive load. A 70 Shore A material resists over-compression and extrusion under high bolt-load or clamping-force conditions, maintaining a stable seal interface over time. Selecting the correct hardness ensures the material conforms to flange surfaces without flowing into the fluid path or losing its sealing cross-section during service.
What is the service temperature range for Bio-Diesel Grade Nitrile Sheet — 70 Durometer?
The service temperature range is -40 to +220°F, as listed on the manufacturer's TDS.
Is Bio-Diesel Grade Nitrile Sheet — 70 Durometer suitable for bio-diesel fuel contact applications?
Yes. This material is specifically formulated for compatibility with bio-diesel fuels including B20 (20% bio-diesel blend) and B100 (neat bio-diesel), as stated on the manufacturer's TDS. No additional regulatory compliance standards are specified on the TDS for this compound.
How should Bio-Diesel Grade Nitrile Sheet — 70 Durometer be specified?
Specify grade (Bio-Diesel Grade Nitrile Sheet — 70 Durometer), thickness, compliance requirements, dimensional tolerances, and finished format.
