Butyl O-Rings Selection Guide
Butyl o-rings provide good electrical properties and a low permeability rate. Butyl has excellent resistance to oxygen and ozone, and is often used in high pressure and vacuum applications.
Butyl o-rings can typically be supplied within a few weeks. As the world's largest o-ring inventory network, Marco Rubber's direct purchasing power can deliver substantial savings on Butyl o-rings. Order Butyl o-rings online today!
Common Names
Butyl Rubber, IIR, Isobutylene-Isoprene
Typical Applications and Products
Butyl rubber is often characterized by excellent resistance to oxygen and ozone, and is often used in high pressure and vacuum applications. Butyl is also resistant to hot water, many acids, and weathering. Butyl is not compatible with miner oil, fuels, or chlorinated hydrcarbons.
- Resistant to ozone
- Resistant to weathering and sunlight
- Resistant to silicone oils
- Resistant to glycol brake fluids (DOT 3, 4, 5.1)
- Resistant to ketones
- Resistant to polar solvents
- Resistant to esters
- Resistant to alcohols
- Resistant to poly-glycol hydraulic fluids
- Resistant to phosphate-ester bases
- Resistant to hot water
- Resistant to steam <250ºF
- Resistant to salt solutions
- Not resistant to common fuels
- Not resistant to mineral oils
- Not resistant to chlorinated hydrocarbons
- Not resistant to petroleum solvents
- Not resistant to coal tar
Mechanical Properties
| Fair Compression Set Resistance |
| Fair Heat Stability |
| Fair Shorter Term Resilience |
| Excellent Permeation Resistance |
| Excellent Electrical Insulator |
Butyl Compatibility
| Marco Compound Number | Datasheet | Hardness (Shore A) | Color | Low Temp | High Temp | Features | |
|---|---|---|---|---|---|---|---|
| Compound: Y1000 | Datasheet:  | Hardness: 70 | Color: Black | Low Temp: -75 °F (-60 °C) | High Temp: 250 °F (125 °C) | Description: General purpose Butyl. Alternative hardness options available. | |
| Compound: Y1001 | Datasheet: | Hardness: 60 | Color: Black | Low Temp: -75 °F (-60 °C) | High Temp: 250 °F (125 °C) | Description: General purpose 60 shore A durometer Butyl. Alternative hardness options available. | |
| Compound: Y1003 | Datasheet: | Hardness: 50 | Color: Black | Low Temp: -75 °F (-60 °C) | High Temp: 250 °F (125 °C) | Description: General purpose 50 shore A durometer Butyl. Alternative hardness options available. | |
| Compound: Y1004 | Datasheet: | Hardness: 60 | Color: Black | Low Temp: -75 °F (-60 °C) | High Temp: 250 °F (125 °C) | Description: 60 Shore A Butyl FDA compliant per CFR 177.2600. | |
| Compound: Y1007 | Datasheet: | Hardness: 70 | Color: Black | Low Temp: -75 °F (-60 °C) | High Temp: 250 °F (125 °C) | Description: 70 Shore A Butyl FDA compliant per CFR 177.2600. |
The information on this page is to the best of our knowledge accurate and reliable. However, Marco Rubber makes no warranty, expressed or implied, that parts manufactured from this material will perform satisfactorily in the customer's application. It's the customer's responsibility to evaluate parts prior to use.
The temperature ranges presented on this page are approximations for dry air service only and should not be used to determine design specifications or end-use temperature limits. Actual temperature range of a compound in an end-use application is highly dependent on part type, hardware configuration, applied forces, chemical media, pressure and thermal cycling effects, and other factors. The most practical way of determining an end-use temperature range is testing in the actual application conditions. Consult a Marco Engineer for more details.
Butyl Temperature Range:
Choose Marco Rubber & Plastics for your Butyl O-Rings
As the world's largest o-ring inventory network, Marco Rubber's direct purchasing power can deliver substantial savings on Buna-N o-rings. Our custom size Buna-N o-rings can typically be supplied without additional tooling fees within a few weeks. Order Butyl o-rings online today, call 800-775-6525 to discuss your specific application with a product expert or get a quote in under 60 minutes.
