Aflas® vs Polyurethane for O-Rings and Seals

	Aflas® (TFE/P, FEPM)	Polyurethane (PU, TPU)


Description	Both materials are well suited for use in the -10 to 66°C range. Polyurethane 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 Aflas® having specific resistences 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. Polyurethane has specific resistence 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.

Compounds

Marco Compound Number	Datasheet	Hardness (Shore A)	Color	Low Temp	High Temp	Features
Compound: L1000	Datasheet:	Hardness: 80	Color: Black	Low 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: L1003	Datasheet:	Hardness: 90	Color: Black	Low 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: L1009	Datasheet:	Hardness: 90	Color: Black	Low 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: L1011	Datasheet:	Hardness: 80	Color: Black	Low 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: P1000	Datasheet:	Hardness: 70	Color: Yellow translucent	Low Temp: -65 °F (-55 °C)	High Temp: 250 °F (125 °C)	Description: High performance 70 durometer Polyurethane
Compound: P1001	Datasheet:	Hardness: 90	Color: Yellow translucent	Low Temp: -65 °F (-55 °C)	High Temp: 250 °F (125 °C)	Description: High performance 90 durometer Polyurethane
Compound: P1004	Datasheet:	Hardness: 90	Color: Translucent	Low Temp: -30 °F (-35 °C)	High Temp: 180 °F (85 °C)	Description: General purpose 90 durometer Polyurethane
Compound: P1006	Datasheet:	Hardness: 70	Color: Translucent	Low Temp: -30 °F (-35 °C)	High Temp: 180 °F (85 °C)	Description: General purpose 70 durometer Polyurethane

Temperature Range Comparison

Units: F C

Box: Base Material Family Range

Whiskers: Specialty Compounds

General Information

Full Name	Aflas®: Aflas® (TFE/P, FEPM)	Polyurethane: Polyurethane (PU, TPU)
Short Name	Aflas®: Aflas®	Polyurethane: Polyurethane
Common Names	Aflas®: Aflas, TFE/P, FEPM	Polyurethane: Urethane, AU, EU, PU

Mechanical Properties

Specialty Resistances

	Brake Fluids	Brake Fluids
	Ozone	Ozone
	Steam <400ºF	Some Hydrocarbon Fuels
	Most Acids	Some Petroleum Oils
	Skydrol Fluids	Silicone Greases
	Low Molecular Weight Ethers	Tear
	Low Molecular Weight Esters	Oxygen
	Vacuum	Water
	Di-ester Lubricants	Hydraulic Fluids
	Halogenated Hydrocarbons	Silicone Oils
	Ammonia	Weathering And Sunlight
	Amines	Aging
	Acetone	Chlorinated Hydrocarbons
	Petroleum Oils	Aliphatic Hydrocarbons
	Strong Acids	Greases
	Gamma-ray Radiation	Mineral Oils
	Hydrogen Sulfide (H2S)	Common Fuels
	Highly Reactive Inorganic Chemicals
	Highly Reactive Organic Chemicals
	Solvents
	Hot Amines
	Steam
	Bases

Specialty Resistances
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
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

Brands

		Vibrathane®
		Millathane®
		Adiprene®

Brands
Aflas®
Polyurethane	Vibrathane® Millathane® Adiprene®

Limitations

	Ketones	Ketones
	Carbon Tetrachloride	Hot Water
	Aromatic Fuels	Alcohols
	Organic Refrigerants	Alkalis
	Chlorinated Hydrocarbons	Ethers
		Glycols
		Esters
		Amines
		Steam
		Acids

Limitations
Aflas®	Carbon Tetrachloride Aromatic Fuels Organic Refrigerants Chlorinated Hydrocarbons
Polyurethane	Hot Water Alcohols Alkalis Ethers Glycols Esters Amines Steam Acids

Aflas® vs Polyurethane for O-Rings and Seals

Aflas® (TFE/P, FEPM)

Polyurethane (PU, TPU)