Silicone Rubber Properties

What are Silicone (VMQ) rubber properties?

Silicones are polymers made up of siloxane – a chain of alternating silicon and oxygen atoms frequently combined with carbon and/or hydrogen. They are often one- or two-part polymers, and may contain fillers to improve properties or reduce cost. In its natural state, silicone rubber is a highly-adhesive gel or liquid. Only when cured, vulcanised or catalysed does it convert to a solid.

The outstanding characteristic of Silicone rubber materials is that they are generally non-reactive, stable, and resistant to extreme environments and temperatures. Trade names include Rhodosil and Elastosil.

Custom rubber moulders - innovation protects key areas of replacement joints during aggressive bio coating procedure for the medical industry
Innovative silicone moulding protects key areas of replacement joints during aggressive bio coating procedure for the medical industry.

What is Silicone rubber commonly used for?

There are multiple formulations of Silicone Rubbers including: steam resistant, metal detectable, high tear strength, extreme high temperature, extreme low temperature, electrically conductive, chemical/oil/acid/gas resistant, low smoke emitting, and flame-retardant. Typical uses include:


Silicone Rubber Property Specifications

Hardness: Shore A
10-90
Tensile Strength PSI
200-1500
Tear Resistance
Poor
Impact Resistance
Good
Compression Set
Good
Low Temperature
-120°C
High Temperature
300°C
Weather and Sunlight
Excellent
Water
Excellent
Abrasion Resistance
Fair to poor
Solvent Resistance
Poor
Oils and Gasoline
Fair to poor
Adhesion to Metals
Good

Rubber materials expertise

At DP Seals we pride ourselves on being able to provide specialist advice in selecting and developing exactly the right blend of materials to meet a vast range of performance requirements.

As part of our service we also maintain a large quantity and variety of quality raw materials in stock, enabling us to offer fast turnaround and provide for tight deadlines.

The information provided here is only a guide to Silicone’s primary characteristics and uses. The relationship between material, product performance and blend options is complex.

Below you’ll find many free resources to help you think about material selection and we are always on hand to discuss your requirements and provide expert advice.

Find out more about our most commonly used Silicone material

Free Resources