What is (NBR) Nitrile Rubber Sheet?
Nitrile Rubber Sheet (NBR / Buna-N) is an oil-resistant elastomeric material designed for seals, gaskets, hoses, and wear linings in petroleum, hydraulic, and industrial applications. It offers excellent resistance to oils, fuels, and hydraulic fluids, combined with good abrasion strength and dimensional stability under load. Available in multiple durometers and food-grade/FDA approved versions, it performs reliably across a wide temperature range.
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Common hardness: 40A → 90A (60A and 70A are typical stock items).
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Available as black standard compounds; white/food-grade NBR (FDA compliant) is offered for hygienic applications.
Key technical highlights
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Excellent oil & fuel resistance — ideal for seals, gaskets and hose liners exposed to petroleum products.
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Service temperature: typically -40°F — 250°F (-40°C to ~121°C) depending on compound.
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Good abrasion and tensile properties for heavy-duty sealing.
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Food-grade / FDA options available for contact with food and beverage where specified.
Common applications
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Automotive & fuel systems (fuel hoses, carburetor parts).
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Hydraulic seals, O-rings and gaskets in machinery.
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Oil & gas, petrochemical plants (pipe linings, flange gaskets).
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Food & beverage / pharma (use FDA/food-grade NBR).
Technical specifications
| Attribute | Typical value / range |
|---|---|
| Material | Nitrile Butadiene Rubber (NBR / Buna-N) |
| Hardness (Shore A) | 40A – 90A (common stock: 60A, 70A). |
| Thickness | 0.5 mm – 12 mm (standard & custom skiving). |
| Width | 36″, 48″, 60″ (rolls & cut sheets available). |
| Temperature range | -40°F to +250°F (-40°C to ~121°C). |
| Colors | Black (standard); white for food-grade/FDA variants. |
| Certifications | ISO 9001, ROHS. |
Typical / common sizes & formats
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Sheets: 36″ × 36″, 36″ × 48″, 48″ × 48″, 60″ × 60″ and metric equivalents; custom cut sizes on demand.
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Rolls: widths 36″ / 48″ with variable lengths (useful for long-run cutting).
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Thicknesses: 1/16″ (1.6 mm), 1/8″ (3.2 mm), 1/4″ (6.4 mm), up to 8–12 mm common — we offer skiving & CNC die-cut.
Advantages of Nitrile Rubber Sheets
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Superior oil & hydrocarbon resistance vs many general elastomers.
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Cost-effective for many industrial sealing applications.
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Good mechanical strength & abrasion resistance — extended service life under dynamic conditions.
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Available in food-grade/FDA compounds for hygiene-sensitive environments.
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Customizable — hardness, thickness, die-cutting and surface treatments available.
Material comparison
| Property / Use | Nitrile (NBR) | EPDM | Neoprene (CR) | Silicone (VMQ) | FKM (Viton) |
|---|---|---|---|---|---|
| Oil & fuel resistance | Excellent. | Poor | Good | Poor | Excellent (better high-temp + chemicals). |
| Weather / ozone resistance | Fair (prone to ozone aging) | Excellent | Very good | Excellent | Very good |
| High temp capability | Up to ~250°F | Up to ~300°F | Up to ~250°F | Excellent (>300°F) | Excellent (high temp). |
| Food-grade options | Available | Available | Available | Available | Limited/expensive |
| Typical use cases | Fuel hoses, gaskets, seals | Outdoor seals, steam | Refrigeration, general sealing | High temp, medical | Harsh chem & high temp seals |
FAQ
Q: What is your MOQ (minimum order quantity)?
A: Typical stock items (standard widths & common thicknesses) can be ordered from 1 sheet or 1 roll. Custom formulations or specialty white food-grade compounds may have MOQ (300 – 1000 kilogram). Confirm at quote stage.
Q: What are typical lead times?
A: Stock sheets/samples: 3–7 business days (samples via express). Custom compounds or large cut-to-size runs: 2–4 weeks depending on volume & finishing. Expedited service may be available. (Confirm exact lead times per SKU.)
Q: How do you ship & what are the shipping terms?
A: Samples: DHL/UPS/FedEx. Bulk: palletized by LCL/FCL or freight forwarder (FOB/CIF available). We provide export packing photos on request.
Q: Do you offer food-grade / FDA compliant NBR?
A: Yes — selected NBR compounds are formulated and tested to meet FDA food contact requirements; TDS/certificates provided on request.
Q: Can you provide die-cut gaskets or CNC parts?
A: Yes — die-cut, waterjet, CNC and laser cutting services available. Upload CAD/DXF for precise quoting.
Q: How to store NBR sheets?
A: Store flat in cool, dry place away from direct sunlight/ozone sources; keep original packaging sealed. Use within recommended shelf life (per supplier).
Q: Which chemicals should be avoided with NBR?
A: NBR resists hydrocarbons well but performs poorly with strong oxidizing agents, some ketones and concentrated aromatics—consult TDS for compatibility.
