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FFKM vs Silicone for O-Rings and Seals

FFKM Perfluoroelastomer

Silicone (VMQ, SIL)

Description
 Both materials are well suited for use in the -15 to 205°C range. Silicone 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 Silicone has a slight advantage. Additionally, Silicone has a slight advantage when considering wear resistance. Also, both materials are equally poor when comparing heat stability. Furthermore, FFKM has a significant advantage when comparing short term resilience. Finally, FFKM has a significant advantage when evaluating differences in permeation resilience. Both materials are resistant to ozone, weathering and sunlight and ketones, with FFKM having specific resistences to steam, solvents, broad spectrum chemical resistance, aliphatic hydrocarbons, chlorinated hydrocarbons, aging, water, esters, ethers, almost universal chemical resistance, extreme high temperatures, inorganic acids and organic acids. Silicone has specific resistence to compression set, vegetable oils, greases, animal oils, silicone oils, oxygen, fungal growth, brake fluids, dry heat, wide temperature range, non-toxic and odorless.
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: 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
FFKM:
FFKM Perfluoroelastomer
Silicone:
Silicone (VMQ, SIL)
Short Name
FFKM:
FFKM
Silicone:
Silicone
Common Names
FFKM:
Perfluoroelastomers, FFKM, Markez
Silicone:
Silicone, VMQ, PVMQ
Mechanical Properties
Specialty Resistances
Ketones
Ketones
Ozone
Ozone
Weathering And Sunlight
Weathering And Sunlight
Organic Acids
Odorless
Inorganic Acids
Non-toxic
Extreme High Temperatures
Wide Temperature Range
Almost Universal Chemical Resistance
Dry Heat
Ethers
Brake Fluids
Esters
Fungal Growth
Water
Oxygen
Aging
Silicone Oils
Chlorinated Hydrocarbons
Animal Oils
Aliphatic Hydrocarbons
Greases
Broad Spectrum Chemical Resistance
Vegetable Oils
Solvents
Compression Set
Steam
Specialty Resistances
FFKM
Organic Acids
Inorganic Acids
Extreme High Temperatures
Almost Universal Chemical Resistance
Ethers
Esters
Water
Aging
Chlorinated Hydrocarbons
Aliphatic Hydrocarbons
Broad Spectrum Chemical Resistance
Solvents
Steam
Silicone
Odorless
Non-toxic
Wide Temperature Range
Dry Heat
Brake Fluids
Fungal Growth
Oxygen
Silicone Oils
Animal Oils
Greases
Vegetable Oils
Compression Set
Brands
Chemraz®
Thermoflex®
Perlast®
Elastosil®
Markez®
Silastic®
Isolast®
Parofluor®
Kalrez®
Brands
FFKM
Chemraz®
Perlast®
Markez®
Isolast®
Parofluor®
Kalrez®
Silicone
Thermoflex®
Elastosil®
Silastic®
Limitations
Dynamic Applications
Dynamic Applications
Fluorinated Fluids
Diluted Sodium Hydroxide
Fluorinated Refrigerants
High Gas Permeability
Perfluorinated Lubricants
Alkalis
Extreme Low Temperatures
Aromatic Mineral Oils
Molten Alkali Metals
Concentrated Solvents
Hot Amines
Concentrated Acids
Hydrocarbon Fuels
Aromatic Hydrocarbons
Steam
Acids
Limitations
FFKM
Fluorinated Fluids
Fluorinated Refrigerants
Perfluorinated Lubricants
Extreme Low Temperatures
Molten Alkali Metals
Hot Amines
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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