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 | Datasheet | Hardness (Shore A) | Color | Low Temp | High Temp | Features | |||
|---|---|---|---|---|---|---|---|---|---|
| Compound: Z1029 | Datasheet:  | Hardness: 75 | Color: White | Low Temp: 5 °F (-15 °C) | High Temp: 575 °F (305 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1203 | Datasheet: | Hardness: 90 | Color: Black | Low Temp: 20 °F (-10 °C) | High Temp: 465 °F (245 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1204 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: 20 °F (-10 °C) | High Temp: 450 °F (235 °C) | Description: | Get Quote | Buy Online | |
| Compound: C505 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: -20 °F (-30 °C) | High Temp: 450 °F (235 °C) | Description: | Get Quote | Buy Online | |
| Compound: C526 | Datasheet: | Hardness: 95 | Color: Black | Low Temp: -5 °F (-25 °C) | High Temp: 475 °F (250 °C) | Description: | Get Quote | Buy Online | |
| Compound: C605 | Datasheet: | Hardness: 80 | Color: Black | Low Temp: -5 °F (-25 °C) | High Temp: 500 °F (260 °C) | Description: | Get Quote | Buy Online | |
| Compound: C615 | Datasheet: | Hardness: 80 | Color: Black | Low Temp: 0 °F (-20 °C) | High Temp: 620 °F (330 °C) | Description: | Get Quote | Buy Online | |
| Compound: K4079 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: 20 °F (-10 °C) | High Temp: 600 °F (320 °C) | Description: | Get Quote | Buy Online | |
| Compound: K6375 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: -5 °F (-25 °C) | High Temp: 525 °F (275 °C) | Description: | Get Quote | Buy Online | |
| Compound: K7075 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: 20 °F (-10 °C) | High Temp: 620 °F (330 °C) | Description: | Get Quote | Buy Online | |
| Compound: K8575 | Datasheet: | Hardness: 60 | Color: White | Low Temp: 20 °F (-10 °C) | High Temp: 575 °F (305 °C) | Description: | Get Quote | Buy Online | |
| Compound: K9100 | Datasheet: | Hardness: 75 | Color: Amber translucent | Low Temp: 20 °F (-10 °C) | High Temp: 575 °F (305 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1026 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: 5 °F (-15 °C) | High Temp: 485 °F (250 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1028 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: 5 °F (-15 °C) | High Temp: 610 °F (320 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1206 | Datasheet: | Hardness: 75 | Color: White | Low Temp: 20 °F (-10 °C) | High Temp: 450 °F (235 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1210 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: 20 °F (-10 °C) | High Temp: 525 °F (275 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1216 | Datasheet: | Hardness: 75 | Color: White | Low Temp: 20 °F (-10 °C) | High Temp: 620 °F (330 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1305 | Datasheet: | Hardness: 80 | Color: White | Low Temp: 5 °F (-15 °C) | High Temp: 590 °F (310 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1307 | Datasheet: | Hardness: 75 | Color: Amber translucent | Low Temp: 5 °F (-15 °C) | High Temp: 525 °F (275 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1317 | Datasheet: | Hardness: 90 | Color: Black | Low Temp: 5 °F (-15 °C) | High Temp: 500 °F (260 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1319 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: 5 °F (-15 °C) | High Temp: 620 °F (330 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1321 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: -50 °F (-50 °C) | High Temp: 480 °F (250 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1322 | Datasheet: | Hardness: 90 | Color: Black | Low Temp: -50 °F (-50 °C) | High Temp: 460 °F (240 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1352 | Datasheet: | Hardness: 80 | Color: Black | Low Temp: 5 °F (-15 °C) | High Temp: 500 °F (260 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1401 | Datasheet: | Hardness: 80 | Color: Black | Low Temp: -20 °F (-30 °C) | High Temp: 615 °F (325 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1403 | Datasheet: | Hardness: 80 | Color: White | Low Temp: -20 °F (-30 °C) | High Temp: 600 °F (315 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1404 | Datasheet: | Hardness: 80 | Color: Black | Low Temp: -5 °F (-25 °C) | High Temp: 500 °F (260 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1409 | Datasheet: | Hardness: 75 | Color: Black | Low Temp: 5 °F (-15 °C) | High Temp: 500 °F (260 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1411 | Datasheet: | Hardness: 60 | Color: Clear-translucent | Low Temp: 5 °F (-15 °C) | High Temp: 535 °F (280 °C) | Description: | Get Quote | Buy Online | |
| Compound: Z1412 | Datasheet: | Hardness: 90 | Color: Black | Low Temp: 5 °F (-15 °C) | High Temp: 590 °F (310 °C) | Description: | Get Quote | Buy Online | |
| Compound: F1001 | Datasheet: | Hardness: 70 | Color: Blue | Low 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 | Get Quote | Buy Online | |
| Compound: F1002 | Datasheet: | Hardness: 75 | Color: Blue | Low 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 | Get Quote | Buy Online | |
| Compound: F1003 | Datasheet: | Hardness: 60 | Color: Blue | Low 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 | Get Quote | Buy Online | |
| Compound: F1006 | Datasheet: | Hardness: 40 | Color: Blue | Low Temp: -100 °F (-75 °C) | High Temp: 350 °F (180 °C) | Description: Jet fuel resistance | Get Quote | Buy Online |
| 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.
