Discover the differences between nitrile vs. neoprene gaskets.
Do you need help with finding the right gasket material? As an engineer, nitrile vs. neoprene is a decision you might have to make.
Both elastomers provide good resistance to compression set and tearing. They withstand the same range of service temperatures, too. Some grades of neoprene also offer excellent resistance to abrasion. Yet, nitrile offers abrasion resistance at elevated temperatures.
Nitrile and neoprene rubber have many similarities, but there are some important differences between these gasket materials. Do you know what they are? It’s time to find out.
In this article from Elasto Proxy, you’ll learn when to use nitrile vs. neoprene gaskets. You’ll also compare these common compounds across all a full list of material properties so that you can make the right choice for your application.
Nitrile vs. Neoprene Gaskets: Material Properties
Nitrile seals offer excellent oil and solvent resistance across a wide temperature range. For example, this synthetic elastomer has very good resistance to engine oil and gasoline, very good resistance to alkalis and acids, and superior resistance to petroleum-based hydraulic fluids. Neoprene seals offer moderate resistance to oils and petroleum products, but provides significantly greater resistance to sunlight, ozone, and weather.
The differences don’t end there. Nitrile gaskets have poor flame resistance. By contrast, neoprene gaskets provide very good-to-excellent resistance against the spread of flame. Nitrile is attacked by sunlight, ozone, and weather. By contrast, neoprene provides reliable resistance against these environmental conditions. Yet, neither rubber resists aromatics or ketones, two types of organic compounds.
The following tables compare nitrile gaskets vs. neoprene gaskets in detail.
General Information | Nitrile Rubber | Neoprene Rubber |
Common Names | Nitrile, Buna-N, NBR | Neoprene |
Chemical Names | Acrylonitrile-butadiene | polychloroprene |
ASTM D-2000 Classification | BF, BG, BK, CH | BC, BE |
Physical Properties | Nitrile Rubber | Neoprene Rubber |
Elongation | 400% to 600% | 100% to 800% |
Hardness (Shore A) | 35 to 90 | 15 to 95 |
Mechanical Properties | Nitrile Rubber | Neoprene Rubber |
Compression Set | Good | Good |
Rebound Rating | Good | Fair to Very Good |
Flex Cracking Resistance | Good | Good to Very Good |
Abrasion Resistance | Good to Excellent | Very Good to Excellent |
Tear Resistance | Good | Good |
Impact Resistance | Fair to Good | Good to Excellent |
Flame Resistance | Poor | Very Good to Excellent |
Thermal Properties | Nitrile Rubber | Neoprene Rubber |
Minimum Service Temperature | -30° F to -70° F | -30° F to -70° F |
Maximum Service Temperature | +220° F to +280°F | +220° F to +280° F |
Environmental Resistance | Nitrile Rubber | Neoprene Rubber |
Weather | Poor | Good |
Sunlight | Poor | Good to Very Good |
Ozone | Poor | Good |
Oxidation | Good | Good |
Water | Good to Excellent | Excellent |
Steam | Fair | Poor to Good |
Gas Permeability | Fair to Good | Fair to Good |
Chemical Resistance | Nitrile Rubber | Neoprene Rubber |
Generally Resistant To | Gases, Aliphatic Hydrocarbon, Oils and Fuels | Moderate chemicals and acids, ozone, oils, fats, greases, and solvents |
Generally Attacked By | Ketones, Ozone, Sunlight, Aromatic Oil, Flame, Weather | Esters, ketones, and chlorinated, aromatic, and nitro hydrocarbons |
Nitrile vs. Neoprene Gasketing: Applications
Nitrile gasketing is recommended for applications that require oil and fuel resistance, abrasion resistance, and temperature resistance up to 280° F. In mobile equipment and military vehicles, nitrile seals or gaskets are used in carburetor diaphragms, fuel systems, and hydraulic hoses. Nitrile also supports rubber-to-metal bonding, which makes it a good choice for applications in the processing industry. However, nitrile isn’t recommended for sealing and insulation that requires resistance to fire, sunlight, ozone, or weather.
By contrast, neoprene gasketing resists fire and withstand sunlight, ozone, and weather. Specific grades of neoprene can also meet flame, smoke and toxicity (FST) requirements for the mass transit industry. Applications include door seals, window seals, hose covers, vibration mounts, and shock absorbers. Neoprene is also used with HVAC units, electrical or electronic enclosures, and weather stripping for fire doors. Additional applications include expansion joints and bearing pads in built structures.
Nitrile vs. Neoprene Gaskets: Make the Right Choice
Material selection is critical because choosing the wrong rubber can cause more than just a component-level failure. Are you comparing nitrile vs. neoprene gaskets for your application? Do you need custom gaskets that add value and reduce risk? Then it’s time to talk to Elasto Proxy.
