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Buna-N (NBR) vs FFKM for O-Rings and Seals

Buna-N (NBR, Nitrile, Buna)

FFKM Perfluoroelastomer

Description
 Both materials are well suited for use in the -15 to 125°C range. FFKM has an advantage in lower temperatures and FFKM has an advantage in higher temperatures. Marco offers specific compound formulations extending these ranges even futher as can be seen in the following compound comparison chart. When comparing these materials with respect to electrical current resistance, FFKM has a significant advantage. The differences in compression set resistence show that both materials are equally Poor. Additionally, both materials are equally Poor when considering wear resistance. Also, FFKM has a slight advantage when comparing heat stability. Furthermore, both materials are equally Poor when comparing short term resilience. Finally, both materials are equally Poor when evaluating differences in permeation resilience. Both materials are resistant to solvents, aliphatic hydrocarbons and water, with Buna-N having specific resistences to acids, common fuels, mineral oils, vegetable oils, greases, diluted alkalies, silicone oils, hydraulic fluids, petroleum oils, ethylene glycol fluids, di-ester lubricants and alcohols. FFKM has specific resistence to steam, ozone, broad spectrum chemical resistance, chlorinated hydrocarbons, aging, weathering and sunlight, ketones, esters, ethers, almost universal chemical resistance, extreme high temperatures, inorganic acids and organic acids.
Compounds
Marco
Compound
Number		DatasheetHardness
(Shore A)		ColorLow TempHigh TempFeatures
Compound: Z1029Datasheet: View DatasheetHardness: 75Color: WhiteLow Temp:
5 °F
(-15 °C)
High Temp:
575 °F
(305 °C)
Description:
Compound: Z1203Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
20 °F
(-10 °C)
High Temp:
465 °F
(245 °C)
Description:
Compound: Z1204Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
20 °F
(-10 °C)
High Temp:
450 °F
(235 °C)
Description:
Compound: Z1028Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
5 °F
(-15 °C)
High Temp:
610 °F
(320 °C)
Description:
Compound: Z1026Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
5 °F
(-15 °C)
High Temp:
485 °F
(250 °C)
Description:
Compound: C505Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
-20 °F
(-30 °C)
High Temp:
450 °F
(235 °C)
Description:
Compound: C526Datasheet: View DatasheetHardness: 95Color: BlackLow Temp:
-5 °F
(-25 °C)
High Temp:
475 °F
(250 °C)
Description:
Compound: C605Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
-5 °F
(-25 °C)
High Temp:
500 °F
(260 °C)
Description:
Compound: C615Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
0 °F
(-20 °C)
High Temp:
620 °F
(330 °C)
Description:
Compound: K4079Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
20 °F
(-10 °C)
High Temp:
600 °F
(320 °C)
Description:
Compound: K6375Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
-5 °F
(-25 °C)
High Temp:
525 °F
(275 °C)
Description:
Compound: K7075Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
20 °F
(-10 °C)
High Temp:
620 °F
(330 °C)
Description:
Compound: K8575Datasheet: View DatasheetHardness: 60Color: WhiteLow Temp:
20 °F
(-10 °C)
High Temp:
575 °F
(305 °C)
Description:
Compound: K9100Datasheet: View DatasheetHardness: 75Color: Amber translucentLow Temp:
20 °F
(-10 °C)
High Temp:
575 °F
(305 °C)
Description:
Compound: Z1206Datasheet: View DatasheetHardness: 75Color: WhiteLow Temp:
20 °F
(-10 °C)
High Temp:
450 °F
(235 °C)
Description:
Compound: Z1210Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
20 °F
(-10 °C)
High Temp:
525 °F
(275 °C)
Description:
Compound: Z1216Datasheet: View DatasheetHardness: 75Color: WhiteLow Temp:
20 °F
(-10 °C)
High Temp:
620 °F
(330 °C)
Description:
Compound: Z1305Datasheet: View DatasheetHardness: 80Color: WhiteLow Temp:
5 °F
(-15 °C)
High Temp:
590 °F
(310 °C)
Description:
Compound: Z1307Datasheet: View DatasheetHardness: 75Color: Amber translucentLow Temp:
5 °F
(-15 °C)
High Temp:
525 °F
(275 °C)
Description:
Compound: Z1317Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
5 °F
(-15 °C)
High Temp:
500 °F
(260 °C)
Description:
Compound: Z1319Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
5 °F
(-15 °C)
High Temp:
620 °F
(330 °C)
Description:
Compound: Z1321Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
-50 °F
(-50 °C)
High Temp:
480 °F
(250 °C)
Description:
Compound: Z1322Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
-50 °F
(-50 °C)
High Temp:
460 °F
(240 °C)
Description:
Compound: Z1352Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
5 °F
(-15 °C)
High Temp:
500 °F
(260 °C)
Description:
Compound: Z1401Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
-20 °F
(-30 °C)
High Temp:
615 °F
(325 °C)
Description:
Compound: Z1403Datasheet: View DatasheetHardness: 80Color: WhiteLow Temp:
-20 °F
(-30 °C)
High Temp:
600 °F
(315 °C)
Description:
Compound: Z1404Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
-5 °F
(-25 °C)
High Temp:
500 °F
(260 °C)
Description:
Compound: Z1409Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
5 °F
(-15 °C)
High Temp:
500 °F
(260 °C)
Description:
Compound: Z1411Datasheet: View DatasheetHardness: 60Color: Clear-translucentLow Temp:
5 °F
(-15 °C)
High Temp:
535 °F
(280 °C)
Description:
Compound: Z1412Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
5 °F
(-15 °C)
High Temp:
590 °F
(310 °C)
Description:
Compound: B1000Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: Lowest cost highest inventory general purpose commodity NBR compound. Compare to Parker N1470-70 and N0674-70 and Parco 4200-70 and 4900-70. Available in nearly any color and hardness.
Compound: B1001Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: General purpose, higher pressure applications. Compare to Parker N0552-90 and N1490-90 and Parco 4200-90 and 4900-90.
Compound: B1002Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: FDA compliant per 21 CFR 177.2600. Compare to Parker N0508-75 and N1069-70.
Compound: B1005Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: FDA compliant, higher hardness.
Compound: B1006Datasheet: View DatasheetHardness: 50Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: General purpose, lower hardness for lower closure force applications. FDA compliant and alternative colors available. Compare to Parker N0299-50.
Compound: B1010Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
225 °F
(110 °C)
Description: General purpose, higher hardness. Compare to Parker N0368-80.
Compound: B1011Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: Internally lubricated with PTFE to reduce friction. Silicone oil and Moly (MOS2) internal lubricants available. Alternative hardness and colors also available.
Compound: B1017Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-35 °F
(-40 °C)
High Temp:
250 °F
(125 °C)
Description: UL 157 listed for several approved uses.
Compound: B1039Datasheet: View DatasheetHardness: 70Color: WhiteLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description:
Compound: B1058Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: NSF 61 certified for drinking water applications.
Compound: B1063Datasheet: View DatasheetHardness: 95Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: Very high hardness for extreme pressure applications.
Compound: B1083Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
275 °F
(135 °C)
Description: Improved lower and higher temperature resistance and improved oil resistance at higher temperature. Compare to Parker N0794-75 and M83461 and Parco 4367-70.
Compound: B1105Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: Metal detectable for contamination detection sensors. FDA compliant per 21 CFR 177.2600. Formulated for food contact and life science applications. Additional colors available.
Compound: B1115Datasheet: View DatasheetHardness: 70Color: BlueLow Temp:
-40 °F
(-40 °C)
High Temp:
250 °F
(125 °C)
Description:
Compound: B1122Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: NSF 51 certified for food contact.
Compound: M1000Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
275 °F
(135 °C)
Description: Mil Spec (Military specification) AMS-P-25732, MS28775-### per MIL-P-25732C-(1).
Compound: M1001Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
275 °F
(135 °C)
Description: Mil Spec (Military specification) AMS-P-83461, M83461/1-### per MIL-P-83461B#3. Improved low temperature resistance and hydraulic fluid resistance.
Compound: M1002Datasheet: View DatasheetHardness: 65Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
250 °F
(125 °C)
Description: Mil Spec (Military specification) MS29513-###, MS29512-##, AMS-P-5315B.
Compound: M1004Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
275 °F
(135 °C)
Description: Mil Spec (Military specification) MS28778, AMS-P-5510C.
Compound: M1005Datasheet: View DatasheetHardness: 65Color: BlackLow Temp:
-70 °F
(-60 °C)
High Temp:
200 °F
(95 °C)
Description: Mil Spec (Military specification) AMS7271, AS3578.
Temperature Range Comparison
Box: Base Material Family Range
Whiskers: Specialty Compounds
General Information
Full Name
Buna-N:
Buna-N (NBR, Nitrile, Buna)
FFKM:
FFKM Perfluoroelastomer
Short Name
Buna-N:
Buna-N
FFKM:
FFKM
Common Names
Buna-N:
Buna-N, Nitrile, NBR, Acrylonitrile Butadiene Rubber
FFKM:
Perfluoroelastomers, FFKM, Markez
Mechanical Properties
Specialty Resistances
Aliphatic Hydrocarbons
Aliphatic Hydrocarbons
Solvents
Solvents
Water
Water
Alcohols
Organic Acids
Di-ester Lubricants
Inorganic Acids
Ethylene Glycol Fluids
Extreme High Temperatures
Petroleum Oils
Almost Universal Chemical Resistance
Hydraulic Fluids
Ethers
Silicone Oils
Esters
Diluted Alkalies
Ketones
Greases
Weathering And Sunlight
Vegetable Oils
Aging
Mineral Oils
Chlorinated Hydrocarbons
Common Fuels
Broad Spectrum Chemical Resistance
Acids
Ozone
Steam
Specialty Resistances
Buna-N
Alcohols
Di-ester Lubricants
Ethylene Glycol Fluids
Petroleum Oils
Hydraulic Fluids
Silicone Oils
Diluted Alkalies
Greases
Vegetable Oils
Mineral Oils
Common Fuels
Acids
FFKM
Organic Acids
Inorganic Acids
Extreme High Temperatures
Almost Universal Chemical Resistance
Ethers
Esters
Ketones
Weathering And Sunlight
Aging
Chlorinated Hydrocarbons
Broad Spectrum Chemical Resistance
Ozone
Steam
Brands
Nipol®
Chemraz®
Perlast®
Markez®
Isolast®
Parofluor®
Kalrez®
Brands
Buna-N
Nipol®
FFKM
Chemraz®
Perlast®
Markez®
Isolast®
Parofluor®
Kalrez®
Limitations
UV Light
Fluorinated Fluids
Aldehydes
Fluorinated Refrigerants
Aromatic Fuels
Perfluorinated Lubricants
Esters
Extreme Low Temperatures
Polar Solvents
Dynamic Applications
Ketones
Molten Alkali Metals
Glycol Brake Fluids (DOT 3, 4, 5.1)
Hot Amines
Weathering And Sunlight
Non-flammable Hydraulic Fluids
Chlorinated Hydrocarbons
Aromatic Hydrocarbons
Limitations
Buna-N
UV Light
Aldehydes
Aromatic Fuels
Esters
Polar Solvents
Ketones
Glycol Brake Fluids (DOT 3, 4, 5.1)
Weathering And Sunlight
Non-flammable Hydraulic Fluids
Chlorinated Hydrocarbons
Aromatic Hydrocarbons
FFKM
Fluorinated Fluids
Fluorinated Refrigerants
Perfluorinated Lubricants
Extreme Low Temperatures
Dynamic Applications
Molten Alkali Metals
Hot Amines
Marco Rubber & Plastics is an industry leader in custom sealing solutions that go beyond the limits of catalog commodities. Since 1980, our solutions have delivered reliable, long-lasting success for customers worldwide. We offer the largest inventory of specialty and standard sealing solutions backed by best-in-class technology, service and support.
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