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Fluorosilicone vs Silicone for O-Rings and Seals

Fluorosilicone (FVMQ, FSIL)

Silicone (VMQ, SIL)

Description
 Both materials are well suited for use in the -60 to 180°C range. Fluorosilicone has an advantage in lower temperatures and Silicone 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 Silicone has a significant advantage. Additionally, Silicone has a significant advantage when considering wear resistance. Also, both materials are equally poor when comparing heat stability. Furthermore, Fluorosilicone has a slight advantage when comparing short term resilience. Finally, both materials are equally Good when evaluating differences in permeation resilience. Both materials are resistant to ozone, compression set, vegetable oils, weathering and sunlight, animal oils, silicone oils, dry heat and wide temperature range, with Fluorosilicone having specific resistences to common fuels, aromatic hydrocarbons, chlorinated hydrocarbons, aging, oxidizing chemicals, chlorinated solvents, diluted alkalies, diester oils, aliphatic fluorocarbons, aromatic fluorocarbons, toluene, benzene, jet fuels, phosphate esters, ammonia, some acids and some petroleum oils. Silicone has specific resistence to greases, oxygen, fungal growth, ketones, brake fluids, non-toxic and odorless.
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 resistance
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 resistance
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 resistance
Compound: F1006Datasheet: View DatasheetHardness: 40Color: BlueLow Temp:
-100 °F
(-75 °C)
High Temp:
350 °F
(180 °C)
Description: Jet fuel resistance
Compound: S1000Datasheet: View DatasheetHardness: 70Color: OrangeLow Temp:
-75 °F
(-60 °C)
High Temp:
400 °F
(205 °C)
Description: General purpose and FDA compliant Silicone per 21 CFR 177.2600   (available in nearly any color and durometer)
Compound: S1001Datasheet: View DatasheetHardness: 70Color: OrangeLow Temp:
-75 °F
(-60 °C)
High Temp:
400 °F
(205 °C)
Description:
Compound: S1004Datasheet: View DatasheetHardness: 40Color: OrangeLow Temp:
-75 °F
(-60 °C)
High Temp:
400 °F
(205 °C)
Description: General purpose softer than standard Silicone to seal rough or warped glands and or low closure force applications
Compound: S1015Datasheet: View DatasheetHardness: 70Color: OrangeLow Temp:
-65 °F
(-55 °C)
High Temp:
600 °F
(320 °C)
Description: Higher temperature resistant Silicone
Compound: S1020Datasheet: View DatasheetHardness: 70Color: Clear-translucentLow Temp:
-65 °F
(-55 °C)
High Temp:
400 °F
(205 °C)
Description: Clear-Translucent and FDA compliant Silicone per 21 CFR 177.2600
Compound: S1032Datasheet: View DatasheetHardness: 70Color: YellowLow Temp:
-75 °F
(-60 °C)
High Temp:
400 °F
(205 °C)
Description:
Compound: S1037Datasheet: View DatasheetHardness: 70Color: Clear-translucentLow Temp:
-65 °F
(-55 °C)
High Temp:
400 °F
(205 °C)
Description: Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Clean Room Manufactured
Compound: S1043Datasheet: View DatasheetHardness: 50Color: OrangeLow Temp:
-105 °F
(-75 °C)
High Temp:
400 °F
(205 °C)
Description: Lower temperature resistant Silicone
Compound: S1081Datasheet: View DatasheetHardness: 65Color: Dark grayLow Temp:
-65 °F
(-55 °C)
High Temp:
350 °F
(180 °C)
Description: EMI RFI Shielding Nickel Coated Graphite filled Silicone, Volume Resistivity 0.10 ohm-cm
Compound: S1083Datasheet: View DatasheetHardness: 70Color: Clear-translucentLow Temp:
-65 °F
(-55 °C)
High Temp:
400 °F
(205 °C)
Description: Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Commercial Manufactured
Compound: S1146Datasheet: View DatasheetHardness: 70Color: WhiteLow Temp:
-75 °F
(-60 °C)
High Temp:
480 °F
(250 °C)
Description: Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Commercial Manufactured
Compound: S1184Datasheet: View DatasheetHardness: 70Color: RedLow Temp:
-75 °F
(-60 °C)
High Temp:
400 °F
(205 °C)
Description:
Compound: S1206Datasheet: View DatasheetHardness: 80Color: Low Temp:
-75 °F
(-60 °C)
High Temp:
400 °F
(205 °C)
Description:
Temperature Range Comparison
Box: Base Material Family Range
Whiskers: Specialty Compounds
General Information
Full Name
Fluorosilicone:
Fluorosilicone (FVMQ, FSIL)
Silicone:
Silicone (VMQ, SIL)
Short Name
Fluorosilicone:
Fluorosilicone
Silicone:
Silicone
Common Names
Fluorosilicone:
Fluorosilicone, FVMQ
Silicone:
Silicone, VMQ, PVMQ
Mechanical Properties
Specialty Resistances
Animal Oils
Animal Oils
Compression Set
Compression Set
Dry Heat
Dry Heat
Ozone
Ozone
Silicone Oils
Silicone Oils
Vegetable Oils
Vegetable Oils
Weathering And Sunlight
Weathering And Sunlight
Wide Temperature Range
Wide Temperature Range
Some Petroleum Oils
Odorless
Some Acids
Non-toxic
Ammonia
Brake Fluids
Phosphate Esters
Ketones
Jet Fuels
Fungal Growth
Benzene
Oxygen
Toluene
Greases
Aromatic Fluorocarbons
Aliphatic Fluorocarbons
Diester Oils
Diluted Alkalies
Chlorinated Solvents
Oxidizing Chemicals
Aging
Chlorinated Hydrocarbons
Aromatic Hydrocarbons
Common Fuels
Specialty Resistances
Fluorosilicone
Some Petroleum Oils
Some Acids
Ammonia
Phosphate Esters
Jet Fuels
Benzene
Toluene
Aromatic Fluorocarbons
Aliphatic Fluorocarbons
Diester Oils
Diluted Alkalies
Chlorinated Solvents
Oxidizing Chemicals
Aging
Chlorinated Hydrocarbons
Aromatic Hydrocarbons
Common Fuels
Silicone
Odorless
Non-toxic
Brake Fluids
Ketones
Fungal Growth
Oxygen
Greases
Brands
Silastic®
Silastic®
Thermoflex®
Elastosil®
Brands
Fluorosilicone
Silicone
Thermoflex®
Elastosil®
Limitations
Dynamic Applications
Dynamic Applications
Phosphate-ester Bases
Diluted Sodium Hydroxide
Adelhydes
High Gas Permeability
Hydrazine
Alkalis
Amines
Aromatic Mineral Oils
Brake Fluids
Concentrated Solvents
Ketones
Concentrated Acids
Hydrocarbon Fuels
Aromatic Hydrocarbons
Steam
Acids
Limitations
Fluorosilicone
Phosphate-ester Bases
Adelhydes
Hydrazine
Amines
Brake Fluids
Ketones
Silicone
Diluted Sodium Hydroxide
High Gas Permeability
Alkalis
Aromatic Mineral Oils
Concentrated Solvents
Concentrated Acids
Hydrocarbon Fuels
Aromatic Hydrocarbons
Steam
Acids
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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