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 | Datasheet | Hardness (Shore A) | Color | Low Temp | High Temp | Features | |||
|---|---|---|---|---|---|---|---|---|---|
| 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 | |
| Compound: S1000 | Datasheet: | Hardness: 70 | Color: Orange | Low 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) | Get Quote | Buy Online | |
| Compound: S1001 | Datasheet: | Hardness: 70 | Color: Orange | Low Temp: -75 °F (-60 °C) | High Temp: 400 °F (205 °C) | Description: | Get Quote | Buy Online | |
| Compound: S1004 | Datasheet: | Hardness: 40 | Color: Orange | Low 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 | Get Quote | Buy Online | |
| Compound: S1015 | Datasheet: | Hardness: 70 | Color: Orange | Low Temp: -65 °F (-55 °C) | High Temp: 600 °F (320 °C) | Description: Higher temperature resistant Silicone | Get Quote | Buy Online | |
| Compound: S1020 | Datasheet: | Hardness: 70 | Color: Clear-translucent | Low Temp: -65 °F (-55 °C) | High Temp: 400 °F (205 °C) | Description: Clear-Translucent and FDA compliant Silicone per 21 CFR 177.2600 | Get Quote | Buy Online | |
| Compound: S1032 | Datasheet: | Hardness: 70 | Color: Yellow | Low Temp: -75 °F (-60 °C) | High Temp: 400 °F (205 °C) | Description: | Get Quote | Buy Online | |
| Compound: S1037 | Datasheet: | Hardness: 70 | Color: Clear-translucent | Low 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 | Get Quote | Buy Online | |
| Compound: S1043 | Datasheet: | Hardness: 50 | Color: Orange | Low Temp: -105 °F (-75 °C) | High Temp: 400 °F (205 °C) | Description: Lower temperature resistant Silicone | Get Quote | Buy Online | |
| Compound: S1081 | Datasheet: | Hardness: 65 | Color: Dark gray | Low 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 | Get Quote | Buy Online | |
| Compound: S1083 | Datasheet: | Hardness: 70 | Color: Clear-translucent | Low 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 | Get Quote | Buy Online | |
| Compound: S1146 | Datasheet: | Hardness: 70 | Color: White | Low 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 | Get Quote | Buy Online | |
| Compound: S1184 | Datasheet: | Hardness: 70 | Color: Red | Low Temp: -75 °F (-60 °C) | High Temp: 400 °F (205 °C) | Description: | Get Quote | Buy Online | |
| Compound: S1206 | Datasheet: | Hardness: 80 | Color: | Low Temp: -75 °F (-60 °C) | High Temp: 400 °F (205 °C) | Description: | Get Quote | Buy Online |
| 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.
