Polyurethane vs Aflas® for O-Rings and Seals

Polyurethane (PU, TPU)

Aflas® (TFE/P, FEPM)

Description
Both materials are well suited for use in the -10 to 66°C range. Aflas® has an advantage in lower temperatures and Aflas® 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, both materials are equally Poor. The differences in compression set resistence show that Aflas® has a slight advantage. Additionally, Aflas® has a slight advantage when considering wear resistance. Also, Aflas® has a significant advantage when comparing heat stability. Furthermore, Polyurethane has a significant advantage when comparing short term resilience. Finally, Aflas® has a slight advantage when evaluating differences in permeation resilience. Both materials are resistant to ozone and brake fluids, with Polyurethane having specific resistences to common fuels, mineral oils, greases, aliphatic hydrocarbons, chlorinated hydrocarbons, aging, weathering and sunlight, silicone oils, hydraulic fluids, water, oxygen, tear, silicone greases, some petroleum oils and some hydrocarbon fuels. Aflas® has specific resistence to bases, steam, hot amines, solvents, highly reactive organic chemicals, highly reactive inorganic chemicals, Hydrogen Sulfide (H2S), gamma-ray radiation, strong acids, petroleum oils, acetone, amines, ammonia, halogenated hydrocarbons, di-ester lubricants, vacuum, low molecular weight esters, low molecular weight ethers, skydrol fluids, most acids and steam <400ºF.
Compounds
Marco
Compound
Number
DatasheetHardness
(Shore A)
ColorLow TempHigh TempFeatures
Compound: L1000Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
15 °F
(-10 °C)
High Temp:
450 °F
(235 °C)
Description: General purpose Aflas ®, steam resistant, sour gas resistant, acid resistance, for chemical and oil industries  (higher performance Alfas® versions avaialble for oil drilling environments)
Compound: L1003Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
15 °F
(-10 °C)
High Temp:
450 °F
(235 °C)
Description: General purpose Aflas® with a higher durometer. Steam resistant, sour gas resistant, acid resistance, for chemical and oil industries. Good for high pressure applications
Compound: L1009Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
30 °F
(0 °C)
High Temp:
475 °F
(250 °C)
Description: Higher performance and higher durometer Aflas®, improved explosive decompression resistance, steam resistance, sour gas resistance, acid resistance, tested to Norsok M-710 for oilfield
Compound: L1011Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
15 °F
(-10 °C)
High Temp:
450 °F
(235 °C)
Description: FDA/USP class VI compliant Aflas® material. Good for a variety of Pharma and Food related applications.
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)
Aflas®:
Aflas® (TFE/P, FEPM)
Short Name
Polyurethane:
Polyurethane
Aflas®:
Aflas®
Common Names
Polyurethane:
Urethane, AU, EU, PU
Aflas®:
Aflas, TFE/P, FEPM
Mechanical Properties
Specialty Resistances
Brake Fluids
Brake Fluids
Ozone
Ozone
Some Hydrocarbon Fuels
Steam <400ºF
Some Petroleum Oils
Most Acids
Silicone Greases
Skydrol Fluids
Tear
Low Molecular Weight Ethers
Oxygen
Low Molecular Weight Esters
Water
Vacuum
Hydraulic Fluids
Di-ester Lubricants
Silicone Oils
Halogenated Hydrocarbons
Weathering And Sunlight
Ammonia
Aging
Amines
Chlorinated Hydrocarbons
Acetone
Aliphatic Hydrocarbons
Petroleum Oils
Greases
Strong Acids
Mineral Oils
Gamma-ray Radiation
Common Fuels
Hydrogen Sulfide (H2S)
Highly Reactive Inorganic Chemicals
Highly Reactive Organic Chemicals
Solvents
Hot Amines
Steam
Bases
Specialty Resistances
Polyurethane
Some Hydrocarbon Fuels
Some Petroleum Oils
Silicone Greases
Tear
Oxygen
Water
Hydraulic Fluids
Silicone Oils
Weathering And Sunlight
Aging
Chlorinated Hydrocarbons
Aliphatic Hydrocarbons
Greases
Mineral Oils
Common Fuels
Aflas®
Steam <400ºF
Most Acids
Skydrol Fluids
Low Molecular Weight Ethers
Low Molecular Weight Esters
Vacuum
Di-ester Lubricants
Halogenated Hydrocarbons
Ammonia
Amines
Acetone
Petroleum Oils
Strong Acids
Gamma-ray Radiation
Hydrogen Sulfide (H2S)
Highly Reactive Inorganic Chemicals
Highly Reactive Organic Chemicals
Solvents
Hot Amines
Steam
Bases
Brands
Vibrathane®
Millathane®
Adiprene®
Brands
Polyurethane
Vibrathane®
Millathane®
Adiprene®
Aflas®
Limitations
Ketones
Ketones
Hot Water
Carbon Tetrachloride
Alcohols
Aromatic Fuels
Alkalis
Organic Refrigerants
Ethers
Chlorinated Hydrocarbons
Glycols
Esters
Amines
Steam
Acids
Limitations
Polyurethane
Hot Water
Alcohols
Alkalis
Ethers
Glycols
Esters
Amines
Steam
Acids
Aflas®
Carbon Tetrachloride
Aromatic Fuels
Organic Refrigerants
Chlorinated Hydrocarbons