Silicone O-Rings Washers Gaskets and Seals

Silicone O-Rings
Silicone O-Rings

Silicone Rubber Characteristics:

Silicones are excellent seal materials for extreme temperature in static applications. Outstanding flex and fatigue life, very good for ozone and UV radiation, insulating properties, and physiologically neutral. Silicones can be synthesized with a wide variety of properties and compositions.

Recommended Use Not Recommended For Mechanical Properties
Dry Heat
Wide Temperature Range
Sunlight, Ozone,  Weathering
Odorless and Non-Toxic
Ketones (MEK)
Acids
Silicone Oils
Brake Fluids
Poor Wear Resistance
Excellent Comp. Set Resistance
Poor Short-Term Resilience
Excellent Permeation Resistance

Order Silicone O-Rings from the world’s largest FDA Silicone O-Rings inventory network.
High Temperature Silicone Gaskets and O-Rings
FDA Food Grade Silicone Seals and O-Rings
USP Class VI Medical Grade Silicone Gaskets and O-Rings

Silicone Rubber Material Compound Comparison:

Hundreds more specialty compounds available. Contact a Marco Sales Consultant or Engineer for more information.

Marco CPD# Color Duro (Shore A) Relative Price Typical Inventory Level High Temp (F) Low Temp (F) Steam < 300 F Steam < 400 F Compression Set Chemical & Solvents Sunliight, Ozone, UV Wear Abrasion Permeation Vacuum Petroleum Oils & Hydraulics Fuels & Gas Brake Fluids
1 = Great    2 = Good    3 = Fair    4 = Poor
Datasheet S1000
Orange 70 O-ring Price Comparison 3 Very High 400 -75 3 4 2 4 1 4 3 4 4 4
General purpose and FDA compliant Silicone per 21 CFR 177.2600   (available in nearly any color and durometer)
Datasheet S1004
Orange 40 O-ring Price Comparison 4 Low 400 -75 3 4 3 4 1 4 3 4 4 4
General purpose softer than standard Silicone to seal rough or warped glands and or low closure force applications
Datasheet S1015
Orange 70 O-ring Price Comparison 4 Low 500 -65 3 4 2 4 1 4 3 4 4 4
Higher temperature resistant Silicone
Datasheet S1043
Orange 50 $$$$ Low 400 -103 3 4 2 4 1 4 3 4 4 4
Lower temperature resistant Silicone
Datasheet S1020
Clear 70 $$$$ Low 400 -65 3 4 2 4 1 4 3 4 4 4
Clear-Translucent and FDA compliant Silicone per 21 CFR 177.2600
Datasheet S1146
White 70 O-ring Price Comparison 4 Low 480 -75 3 4 2 4 1 4 3 4 4 4
Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Commercial Manufactured
Datasheet S1083
Clear 70 O-ring Price Comparison 4 Low 400 -65 3 4 2 4 1 4 3 4 4 4
Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Commercial Manufactured
Datasheet S1037
Clear 70 O-ring Price Comparison 5 Low 400 -65 3 4 2 4 1 4 3 4 4 4
Medical Grade USP Class VI and FDA compliant Silicone, Platinium Cured, Clean Room Manufactured
Datasheet S1081
Orange 65 $$$$ Low 350 -65 4 4 4 4 1 4 3 4 4 4
EMI RFI Shielding Nickel Coated Graphite filled Silicone, Volume Resistivity 0.10 ohm-cm

Service Temperature Range:

The temperature ranges presented above 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.

Common Names:

Silicone, VMQ, PVMQ

Silicone Rubber Trade Names:

Silastic®, Elastosil®, Thermoflex®

Silicone Rubber Features:

The term silicone covers a large group of materials in which vinyl-methyl-silicone (VMQ) is often the central ingredient.

Silicone Rubber Limitations:

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New Customer Hotline: 800-775-6525

Existing Customer Specialist: 800-775-6525 or repeat customers

Marco Rubber & Plastics
PO Box 1150
Seabrook, NH 03874

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