Fluorosilicone vs Polyurethane for O-Rings and Seals

Fluorosilicone (FVMQ, FSIL)

Polyurethane (PU, TPU)

Description
Both materials are well suited for use in the -23 to 66°C range. Fluorosilicone has an advantage in lower temperatures and Fluorosilicone 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, Fluorosilicone has a slight advantage. The differences in compression set resistence show that Fluorosilicone has a slight advantage. Additionally, Fluorosilicone has a slight advantage when considering wear resistance. Also, Fluorosilicone has a significant advantage when comparing heat stability. Furthermore, Polyurethane has a significant advantage when comparing short term resilience. Finally, Polyurethane has a significant advantage when evaluating differences in permeation resilience. Both materials are resistant to ozone, common fuels, chlorinated hydrocarbons, aging, weathering and sunlight, silicone oils and some petroleum oils, with Fluorosilicone having specific resistences to compression set, vegetable oils, aromatic hydrocarbons, oxidizing chemicals, animal oils, chlorinated solvents, diluted alkalies, diester oils, aliphatic fluorocarbons, aromatic fluorocarbons, toluene, benzene, jet fuels, phosphate esters, dry heat, wide temperature range, ammonia and some acids. Polyurethane has specific resistence to mineral oils, greases, aliphatic hydrocarbons, hydraulic fluids, water, oxygen, tear, brake fluids, silicone greases and some hydrocarbon fuels.
Compounds
Marco
Compound
Number
DatasheetHardness
(Shore A)
ColorLow TempHigh TempFeatures
Compound: F1001Datasheet: View DatasheetHardness: 70Color: BlueLow Temp:
-100 °F
(-75 °C)
High Temp:
350 °F
(180 °C)
Description: Aerospace Military Specification Mil-Spec AMS-R-25988 M25988/1-### per Mil-R-25988 CL-1 GR-70, jet fuel resistanceGet QuoteBuy Online
Compound: F1002Datasheet: View DatasheetHardness: 75Color: BlueLow Temp:
-80 °F
(-65 °C)
High Temp:
350 °F
(180 °C)
Description: Aerospace Military Specification Mil-Spec AMS-R-25988 M25988/2, jet fuel resistanceGet QuoteBuy Online
Compound: F1003Datasheet: View DatasheetHardness: 60Color: BlueLow Temp:
-100 °F
(-75 °C)
High Temp:
350 °F
(180 °C)
Description: Aerospace Military Specification Mil-Spec AMS-R-25988 M25988/3, jet fuel resistanceGet QuoteBuy Online
Compound: F1006Datasheet: View DatasheetHardness: 40Color: BlueLow Temp:
-100 °F
(-75 °C)
High Temp:
350 °F
(180 °C)
Description: Jet fuel resistanceGet QuoteBuy Online
Compound: P1000Datasheet: View DatasheetHardness: 70Color: Yellow translucentLow Temp:
-65 °F
(-55 °C)
High Temp:
250 °F
(125 °C)
Description: High performance 70 durometer PolyurethaneGet QuoteBuy Online
Compound: P1001Datasheet: View DatasheetHardness: 90Color: Yellow translucentLow Temp:
-65 °F
(-55 °C)
High Temp:
250 °F
(125 °C)
Description: High performance 90 durometer PolyurethaneGet QuoteBuy Online
Compound: P1004Datasheet: View DatasheetHardness: 90Color: TranslucentLow Temp:
-30 °F
(-35 °C)
High Temp:
180 °F
(85 °C)
Description: General purpose 90 durometer PolyurethaneGet QuoteBuy Online
Compound: P1006Datasheet: View DatasheetHardness: 70Color: TranslucentLow Temp:
-30 °F
(-35 °C)
High Temp:
180 °F
(85 °C)
Description: General purpose 70 durometer PolyurethaneGet QuoteBuy Online
Temperature Range Comparison
Box: Base Material Family Range
Whiskers: Specialty Compounds
General Information
Full Name
Fluorosilicone:
Fluorosilicone (FVMQ, FSIL)
Polyurethane:
Polyurethane (PU, TPU)
Short Name
Fluorosilicone:
Fluorosilicone
Polyurethane:
Polyurethane
Common Names
Fluorosilicone:
Fluorosilicone, FVMQ
Polyurethane:
Urethane, AU, EU, PU
Mechanical Properties
Specialty Resistances
Aging
Aging
Chlorinated Hydrocarbons
Chlorinated Hydrocarbons
Common Fuels
Common Fuels
Ozone
Ozone
Silicone Oils
Silicone Oils
Some Petroleum Oils
Some Petroleum Oils
Weathering And Sunlight
Weathering And Sunlight
Some Acids
Some Hydrocarbon Fuels
Ammonia
Silicone Greases
Wide Temperature Range
Brake Fluids
Dry Heat
Tear
Phosphate Esters
Oxygen
Jet Fuels
Water
Benzene
Hydraulic Fluids
Toluene
Aliphatic Hydrocarbons
Aromatic Fluorocarbons
Greases
Aliphatic Fluorocarbons
Mineral Oils
Diester Oils
Diluted Alkalies
Chlorinated Solvents
Animal Oils
Oxidizing Chemicals
Aromatic Hydrocarbons
Vegetable Oils
Compression Set
Specialty Resistances
Fluorosilicone
Some Acids
Ammonia
Wide Temperature Range
Dry Heat
Phosphate Esters
Jet Fuels
Benzene
Toluene
Aromatic Fluorocarbons
Aliphatic Fluorocarbons
Diester Oils
Diluted Alkalies
Chlorinated Solvents
Animal Oils
Oxidizing Chemicals
Aromatic Hydrocarbons
Vegetable Oils
Compression Set
Polyurethane
Some Hydrocarbon Fuels
Silicone Greases
Brake Fluids
Tear
Oxygen
Water
Hydraulic Fluids
Aliphatic Hydrocarbons
Greases
Mineral Oils
Brands
Silastic®
Vibrathane®
Millathane®
Adiprene®
Brands
Fluorosilicone
Silastic®
Polyurethane
Vibrathane®
Millathane®
Adiprene®
Limitations
Amines
Amines
Ketones
Ketones
Phosphate-ester Bases
Hot Water
Adelhydes
Alcohols
Hydrazine
Alkalis
Dynamic Applications
Ethers
Brake Fluids
Glycols
Esters
Steam
Acids
Limitations
Fluorosilicone
Phosphate-ester Bases
Adelhydes
Hydrazine
Dynamic Applications
Brake Fluids
Polyurethane
Hot Water
Alcohols
Alkalis
Ethers
Glycols
Esters
Steam
Acids