Silicone

A group of elastomers, made from silicon, oxygen, hydrogen and carbon, Silicones are renowned for their retention of flexibility and low compression set characteristics, within one of the widest working temperature ranges for elastomers.


Trade Name(s):

Elastosil

Wacher

Silastic

Dow Corning

Silplus

Momentive Performance Materials

ASTM D1418 Designation

VMQ, MQ, PMQ, PVMQ

Standard Colour

Red

Description

A group of elastomers, made from silicon, oxygen, hydrogen and carbon, Silicones are renowned for their retention of flexibility and low compression set characteristics, within one of the widest working temperature ranges for elastomers.

Key Uses(S):

Silicone rubbers (VMQ) offer wide temperature ranges and low temperature flexibility. This material should be used for static sealing as Silicones have poor tensile strength, tear resistance, and abrasion resistance. Retention of properties of silicone at high temperature is superior to most other elastic materials. Silicone compounds are very clean and are used in many food and medical applications.

Temperature Range:

Standard Compound: -55°C (-67°F) to 204°C (400°F)

Special Compounds: -100°C (-148°F) to 204°C (400°F)

Hardness (Shore A):

30 TO 90

Features

Phenyl (PVMQ) based silicones can perform to -100°C (-148°F) and new polymers can take short term to 315°C (600°F.). Silicone is resistant to hot air, ozone, UV radiation, engine and transmission oils, animal and vegetable fats and oils. Silicone also has low resistance to mineral oils and can be compounded to be electrically resistant, conductive, or flame retardant.

Limitations

Silicone compounds are not recommended for dynamic O-ring sealing applications due to relatively low tear strength and high coefficient of friction. Silicone does not perform well in concentrated acids, Fuels, Gear Oils, Ketones (MEK, Acetone) and Steam.

Please note: This Perfluoroelastomer Material Data Sheet section is to be used as a professional guide only. Eastern Seals (UK) Ltd may source their products from a variety of Quality Approved Suppliers and the data shown should not be relied upon by any purchaser without verification of material source.

 

ES REF
Colour
Temp Range
Shore
Notes
Data Sheet
S50 FDA RED -55°C to 225°C 50 Food quality. Compliant to CFR 21 177-2600.
S60 FDA RED -55°C to 225°C 60 Food quality. Compliant to CFR 21 177-2600.
S60T (extruded cord) TRANSPARENT -55°C to 225°C 60 Food quality. Compliant to CFR 21 177-2600
S60W (extruded cord) WHITE -55°C to 225°C 60 Food quality. Compliant to CFR 21 177-2600
S60R (extruded cord) RED -55°C to 225°C 60 Food quality. Compliant to CFR 21 177-2600
S70T (extruded cord) TRANSPARENT -55°C to 225°C 70 Food quality. Compliant to CFR 21 177-2600
S70 FDA RED -55°C to 225°C 70 Food quality. Meets European Framework Regulation (EC) 1935/2004. Compliant to CFR 21 177-2600
S70 WH FDA WHITE -55°C to 225°C 70 Food quality. Compliant to CFR 21 177-2600.
S70 CLEAR (Transparent) -55°C to 225°C 70 Clear (transparent) 70 shore Silicone.
S70 PLT TRANSPARENT -50°C to +200°C 70 Silicone 70 Platinum Cured. Developed to support use of this silicone rubber in pharmaceutical processing and food processing applications. S70PLT – Platinum cured is FDA approved in accordance with Code of Federal Regulations Title 21 (CFR21), Section 177.2600 and USP Class VI. ISO 10993-1 , cytotoxicity, sensitization and irritation / intracuteous reactivity.
S70 USP Class VI CLEAR (Transparent) -50°C to +200°C 70 Developed to support use of this silicone rubber in pharmaceutical processing and food processing applications. Formulated using only those ingredients determined by the United States Federal Food and Drug Administration (FDA) to be in accordance with Code of Federal Regulations Title 21 (CFR21), Section 177.2600. The desirable traits of cleanliness, low odour index are exhibited by our compound so that our customers receive a silicone rubber product that leads the industry in cleanliness and purity.
S70BLMD BLUE -50°C to +200°C 70 Developed to support use of silicone rubber in food processing applications. The material is electrically conductive. Fragments as small as 2mm can be identified by in-line metal detection and X-ray equipment. This material has been formulated using only the ingredients determined by the United States Federal Food and Drug Administration (FDA) to be in accordance with Code of Federal Regulations Title 21 (CFR21), Section 177.2600.
S70 FDA vulcanised jointed rings RED -60⁰C to +220⁰C continuous (+250⁰C peak) 70 Food quality. Excellent resistance to Weathering. High gas permeability resistance. Compliant to CFR 21 177-2600
Silicone FEP Encapsulated RED -60°C to +205°C
Short duration: to +260°C
Manufactured to meet the requirements of; AS568/BS1806 tolerance specifications. Silicone core (Silicone AH3188U) of our Encapsulated ‘O’ Ring complies with Part 177 of Title 21 of the Food and Drug Administration regulations for safe use as articles or components of articles for producing, manufacturing, processing, preparing, treating, packing, transporting or holding food in accordance with FDA regulation 21.CFR.177.2600.
Silicone PFA Encapsulated RED -60◦C to +260◦C
Short duration: to +300◦C
Manufactured to meet the requirements of; AS568/BS1806 tolerance specifications. Silicone core (Silicone AH3188U) of our Encapsulated ‘O’ Ring complies with Part 177 of Title 21 of the Food and Drug Administration regulations for safe use as articles or components of articles for producing, manufacturing, processing, preparing, treating, packing, transporting or holding food in accordance with FDA regulation 21.CFR.177.2600.

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