Nitrile (NBR) and neoprene (CR) are the two synthetic rubber sheets buyers confuse most often while choosing the right sheet for their industrial applications. Both resist oil and chemicals reasonably well, both hold up under repeated flexing, and both show up in gasket, seal, and lining specs across industrial plants. The difference that actually decides which one you need comes down to four things: oil and fuel exposure, weather and ozone exposure, flame risk and operating temperature. This page compares NBR and CR on each of those, with Duratuf grade-level specs so you are not guessing at generic polymer data.
Need help choosing a grade for a specific application? Talk to our technical team or request a sample before you commit to a bulk order.
What is Nitrile Rubber (NBR)?
Nitrile rubber, also called Buna-N or NBR, is a synthetic copolymer of acrylonitrile and butadiene. It is the standard choice wherever a rubber sheet has to sit in constant contact with oil, fuel or hydraulic fluid, which is why it shows up so often in petrochemical, automotive, and general manufacturing settings.
Key Properties of Nitrile Rubber
- Strong resistance to oils, fuels and hydraulic fluids
- Good resistance to dilute acids and bases
- High tensile strength and good abrasion resistance
- Poor resistance to ozone, UV and outdoor weathering
- Operating range varies by grade, roughly -10°C to +110°C across the Duratuf Nitri65 range (see table below)
Nitrile Rubber Sheet: Common Uses
- Gaskets, seals, and O-rings in oil-rich environments
- Fuel-handling hoses and diaphragms
- Industrial gloves, footwear, and wear pads exposed to hydrocarbons
Duratuf Nitrile Rubber Sheets: Tech Specs at a Glance
| Grade | NBR % | Hardness | Tensile Strength (Spec / Observed) | Elongation (Spec / Observed) | SG | Temperature Range |
| Nitri65 Lite | 10% | 65 Shore A | 4.0 / 4.3 MPa | 200% / 215% | 1.45 | -10°C to +60°C |
| Nitri65 X | 30% | 65 Shore A | 5.0 / 5.5 MPa | 250% / 275% | 1.45 | -10°C to +70°C |
| Nitri65 Pro | 50% | 65 Shore A | 5.0 / 5.3 MPa | 250% / 265% | 1.40 | -20°C to +90°C |
| Nitri65 Max | 100% | 65 Shore A | 10.0 / 11.4 MPa | 300% / 350% | 1.30 | -30°C to +110°C |
Full spec sheets and warranty terms: Nitri65 Pro (balanced, most common spec) and Nitri65 Max (100% NBR, highest tensile and temperature rating).
What is Neoprene Rubber (CR)?
Neoprene or polychloroprene, is a synthetic rubber built around chloroprene polymers. It trades some oil resistance for a big advantage outdoors: sunlight, ozone and weather barely touch it. That is why neoprene sheet turns up more often in marine, HVAC, and outdoor equipment applications than nitrile does.
Key Properties of Neoprene Rubber
- Excellent resistance to weathering, UV and ozone
- Good flame resistance, better than nitrile
- Moderate resistance to oils and chemicals
- Operating range varies by grade, roughly -20°C to +110°C across the Duratuf Neo65 range (see table below)
Neoprene Rubber Sheet: Common Uses
- Marine gaskets and padding
- HVAC system seals and linings
- Outdoor equipment seals, weatherproofing and industrial hoses
Duratuf Neoprene Rubber Sheets: Tech Specs at a Glance
| Grade | CR % | Hardness | Tensile Strength (Spec / Observed) | Elongation (Spec / Observed) | SG | Temperature Range |
| Neo65 Lite | 10% | 65 Shore A | 4.0 / 4.2 MPa | 200% / 221% | 1.40 | -20°C to +70°C |
| Neo60 X | 30% | 60 Shore A | 4.0 / 4.3 MPa | 225% / 250% | 1.35 | -20°C to +70°C |
| Neo65 Pro | 50% | 65 Shore A | 5.0 / 5.5 MPa | 250% / 267% | 1.40 | -30°C to +90°C |
| Neo65 Max | 100% | 65 Shore A | 10.0 / 10.6 MPa | 350% / 368% | 1.45 | -30°C to +110°C |
Full spec sheet: Neo65 Max for the highest flame, weather, and temperature rating in the range.
What are the Difference Between Nitrile vs Neoprene?
Here is the side-by-side comparison, corrected to reflect actual grade-level performance rather than generic polymer claims:
| Factor | Nitrile Rubber (NBR) | Neoprene Rubber (CR) |
| Oil & Fuel Resistance | Superior. Built for constant contact with oils, fuels, and hydraulic fluid | Moderate. Fine for intermittent oil exposure, not constant immersion |
| Weather / UV / Ozone | Poor. Degrades under prolonged sun and ozone exposure | Excellent. This is neoprene’s main advantage over nitrile |
| Flame Resistance | Poor. Not rated for flame-risk applications | Good. Meets many flame-retardant use cases |
| Temperature Range (Duratuf grades) | -10°C to +110°C, depending on grade | -20°C to +110°C, depending on grade |
| Flexibility at Low Temperature | Stiffer at low temperatures within its range | Retains flexibility slightly better across its range |
| Cost | Driven mainly by grade tier, not the base polymer | Driven mainly by grade tier, not the base polymer |
Note on cost and temperature: both materials top out at +110°C at their highest grade (Nitri65 Max and Neo65 Max), so temperature alone should not decide this choice. Cost also scales with polymer percentage within each family, not with nitrile versus neoprene as a category. A Lite-grade sheet in either material costs less than a Max-grade sheet in either material.
How to Choose the Right Rubber Sheet for Your Application
Four questions decide this, in order of importance:
1. What is your primary exposure?
Constant oil, fuel or hydraulic fluid contact points to nitrile. Outdoor exposure to sun, ozone or weather points to neoprene. If both are present, the exposure that causes faster material breakdown should win.
2. Is flame risk part of the spec?
Neoprene is the safer default wherever a flame-retardance requirement exists. Nitrile is not rated for this.
3. What is your operating temperature?
Match against the grade table above rather than a generic material spec. A Nitri65 Lite sheet rated to +60°C will fail well before a Neo65 Max sheet rated to +110°C, even though both are technically “nitrile” or “neoprene.”
4. What is your budget and expected service life?
Higher polymer percentage (X, Pro, Max grades) costs more upfront and lasts longer under stress. Lite grades suit low-stress, short-cycle applications. Check Duratuf’s warranty terms by grade before ordering, since warranty period is a reasonable proxy for expected service life.
Case-Studies:
An automotive manufacturing plant needs two different rubber sheets on the same line:
- Engine gaskets exposed to constant oil and grease: Nitri65 Pro or Nitri65 Max, chosen for oil resistance and tensile strength under repeated compression
- Weatherproof seals on outdoor air-conditioning units: Neo65 Pro or Neo65 Max, chosen for UV and ozone resistance in continuous outdoor exposure
Using nitrile on the outdoor seals would mean replacing them well before their expected service life. Using neoprene on the oil-exposed gaskets would mean the same failure, just from the opposite exposure.
Conclusion
Nitrile and neoprene solve different problems. Nitrile wins wherever oil and fuel resistance matters most. Neoprene wins wherever weather, ozone, and flame resistance matter most. Within each material, the grade you choose, from Lite to Max, decides your actual temperature range, tensile strength, and service life far more than the base polymer name does. Match your exposure and operating conditions to the grade tables above, not to generic claims about the material family.
Still unsure which grade fits your application? Contact our technical team for a recommendation, or request a sample before committing to a bulk order.
