Request Quote

FFKM vs Fluorosilicone for O-Rings and Seals

FFKM Perfluoroelastomer

Fluorosilicone (FVMQ, FSIL)

Description
 Both materials are well suited for use in the -15 to 180°C range. Fluorosilicone 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, both materials are equally poor. The differences in compression set resistence show that FFKM has a slight advantage. Additionally, FFKM has a slight advantage when considering wear resistance. Also, both materials are equally poor when comparing heat stability. Furthermore, FFKM has a slight advantage when comparing short term resilience. Finally, FFKM has a significant advantage when evaluating differences in permeation resilience. Both materials are resistant to ozone, chlorinated hydrocarbons, aging and weathering and sunlight, with FFKM having specific resistences to steam, solvents, broad spectrum chemical resistance, aliphatic hydrocarbons, water, ketones, esters, ethers, almost universal chemical resistance, extreme high temperatures, inorganic acids and organic acids. Fluorosilicone has specific resistence to compression set, common fuels, vegetable oils, aromatic hydrocarbons, oxidizing chemicals, animal oils, chlorinated solvents, diluted alkalies, diester oils, aliphatic fluorocarbons, aromatic fluorocarbons, silicone oils, toluene, benzene, jet fuels, phosphate esters, dry heat, wide temperature range, ammonia, some acids and some petroleum oils.
Compounds
Marco
Compound
Number		DatasheetHardness
(Shore A)		ColorLow TempHigh TempFeatures
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: 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: 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: 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
Temperature Range Comparison
Box: Base Material Family Range
Whiskers: Specialty Compounds
General Information
Full Name
FFKM:
FFKM Perfluoroelastomer
Fluorosilicone:
Fluorosilicone (FVMQ, FSIL)
Short Name
FFKM:
FFKM
Fluorosilicone:
Fluorosilicone
Common Names
FFKM:
Perfluoroelastomers, FFKM, Markez
Fluorosilicone:
Fluorosilicone, FVMQ
Mechanical Properties
Specialty Resistances
Aging
Aging
Chlorinated Hydrocarbons
Chlorinated Hydrocarbons
Ozone
Ozone
Weathering And Sunlight
Weathering And Sunlight
Organic Acids
Some Petroleum Oils
Inorganic Acids
Some Acids
Extreme High Temperatures
Ammonia
Almost Universal Chemical Resistance
Wide Temperature Range
Ethers
Dry Heat
Esters
Phosphate Esters
Ketones
Jet Fuels
Water
Benzene
Aliphatic Hydrocarbons
Toluene
Broad Spectrum Chemical Resistance
Silicone Oils
Solvents
Aromatic Fluorocarbons
Steam
Aliphatic Fluorocarbons
Diester Oils
Diluted Alkalies
Chlorinated Solvents
Animal Oils
Oxidizing Chemicals
Aromatic Hydrocarbons
Vegetable Oils
Common Fuels
Compression Set
Specialty Resistances
FFKM
Organic Acids
Inorganic Acids
Extreme High Temperatures
Almost Universal Chemical Resistance
Ethers
Esters
Ketones
Water
Aliphatic Hydrocarbons
Broad Spectrum Chemical Resistance
Solvents
Steam
Fluorosilicone
Some Petroleum Oils
Some Acids
Ammonia
Wide Temperature Range
Dry Heat
Phosphate Esters
Jet Fuels
Benzene
Toluene
Silicone Oils
Aromatic Fluorocarbons
Aliphatic Fluorocarbons
Diester Oils
Diluted Alkalies
Chlorinated Solvents
Animal Oils
Oxidizing Chemicals
Aromatic Hydrocarbons
Vegetable Oils
Common Fuels
Compression Set
Brands
Chemraz®
Silastic®
Perlast®
Markez®
Isolast®
Parofluor®
Kalrez®
Brands
FFKM
Chemraz®
Perlast®
Markez®
Isolast®
Parofluor®
Kalrez®
Fluorosilicone
Silastic®
Limitations
Dynamic Applications
Dynamic Applications
Fluorinated Fluids
Phosphate-ester Bases
Fluorinated Refrigerants
Adelhydes
Perfluorinated Lubricants
Hydrazine
Extreme Low Temperatures
Amines
Molten Alkali Metals
Brake Fluids
Hot Amines
Ketones
Limitations
FFKM
Fluorinated Fluids
Fluorinated Refrigerants
Perfluorinated Lubricants
Extreme Low Temperatures
Molten Alkali Metals
Hot Amines
Fluorosilicone
Phosphate-ester Bases
Adelhydes
Hydrazine
Amines
Brake Fluids
Ketones
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.
About UsProductsServicesShop OnlineContact Us
Give us a call: (603) 468-3600
Terms & ConditionsShipping & ReturnsSitemap
Copyright 2025 Marco Rubber and Plastics. All Rights Reserved.