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Polyurethane vs FFKM for O-Rings and Seals

Polyurethane (PU, TPU)

FFKM Perfluoroelastomer

Description
 Both materials are well suited for use in the -15 to 66°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 slight advantage. The differences in compression set resistence show that FFKM has a significant advantage. Additionally, FFKM has a significant advantage when considering wear resistance. Also, FFKM has a significant advantage when comparing heat stability. Furthermore, Polyurethane has a slight advantage when comparing short term resilience. Finally, both materials are equally Poor when evaluating differences in permeation resilience. Both materials are resistant to ozone, aliphatic hydrocarbons, chlorinated hydrocarbons, aging, weathering and sunlight and water, with Polyurethane having specific resistences to common fuels, mineral oils, greases, silicone oils, hydraulic fluids, oxygen, tear, brake fluids, silicone greases, some petroleum oils and some hydrocarbon fuels. FFKM has specific resistence to steam, solvents, broad spectrum chemical resistance, 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: 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: 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: 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: P1000Datasheet: View DatasheetHardness: 70Color: Yellow translucentLow Temp:
-65 °F
(-55 °C)
High Temp:
250 °F
(125 °C)
Description: High performance 70 durometer Polyurethane
Compound: P1001Datasheet: View DatasheetHardness: 90Color: Yellow translucentLow Temp:
-65 °F
(-55 °C)
High Temp:
250 °F
(125 °C)
Description: High performance 90 durometer Polyurethane
Compound: P1004Datasheet: View DatasheetHardness: 90Color: TranslucentLow Temp:
-30 °F
(-35 °C)
High Temp:
180 °F
(85 °C)
Description: General purpose 90 durometer Polyurethane
Compound: P1006Datasheet: View DatasheetHardness: 70Color: TranslucentLow Temp:
-30 °F
(-35 °C)
High Temp:
180 °F
(85 °C)
Description: General purpose 70 durometer Polyurethane
Temperature Range Comparison
Box: Base Material Family Range
Whiskers: Specialty Compounds
General Information
Full Name
Polyurethane:
Polyurethane (PU, TPU)
FFKM:
FFKM Perfluoroelastomer
Short Name
Polyurethane:
Polyurethane
FFKM:
FFKM
Common Names
Polyurethane:
Urethane, AU, EU, PU
FFKM:
Perfluoroelastomers, FFKM, Markez
Mechanical Properties
Specialty Resistances
Aging
Aging
Aliphatic Hydrocarbons
Aliphatic Hydrocarbons
Chlorinated Hydrocarbons
Chlorinated Hydrocarbons
Ozone
Ozone
Water
Water
Weathering And Sunlight
Weathering And Sunlight
Some Hydrocarbon Fuels
Organic Acids
Some Petroleum Oils
Inorganic Acids
Silicone Greases
Extreme High Temperatures
Brake Fluids
Almost Universal Chemical Resistance
Tear
Ethers
Oxygen
Esters
Hydraulic Fluids
Ketones
Silicone Oils
Broad Spectrum Chemical Resistance
Greases
Solvents
Mineral Oils
Steam
Common Fuels
Specialty Resistances
Polyurethane
Some Hydrocarbon Fuels
Some Petroleum Oils
Silicone Greases
Brake Fluids
Tear
Oxygen
Hydraulic Fluids
Silicone Oils
Greases
Mineral Oils
Common Fuels
FFKM
Organic Acids
Inorganic Acids
Extreme High Temperatures
Almost Universal Chemical Resistance
Ethers
Esters
Ketones
Broad Spectrum Chemical Resistance
Solvents
Steam
Brands
Vibrathane®
Chemraz®
Millathane®
Perlast®
Adiprene®
Markez®
Isolast®
Parofluor®
Kalrez®
Brands
Polyurethane
Vibrathane®
Millathane®
Adiprene®
FFKM
Chemraz®
Perlast®
Markez®
Isolast®
Parofluor®
Kalrez®
Limitations
Hot Water
Fluorinated Fluids
Alcohols
Fluorinated Refrigerants
Alkalis
Perfluorinated Lubricants
Ethers
Extreme Low Temperatures
Glycols
Dynamic Applications
Esters
Molten Alkali Metals
Amines
Hot Amines
Ketones
Steam
Acids
Limitations
Polyurethane
Hot Water
Alcohols
Alkalis
Ethers
Glycols
Esters
Amines
Ketones
Steam
Acids
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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