Published - 3rd May 2023
Viton® may not be a name that’s familiar to you, but it’s a material that you’ve probably come into contact with many times before. Viton® is a synthetic rubber and fluoropolymer elastomer, commonly used in O-rings, gaskets and seals, and is renowned for its ability to withstand even the harshest environments, temperature extremes and harsh chemicals. Originally developed by DuPont, Chemours is now the company behind the Viton® brand and the term Viton® has become synonymous for fluoroelstomers.
This family of elastomers comprises copolymers of terpolymers of tetrafluoroethylene (TFE), hexafluoropropylene (HFP) and vinylidene fluoride (VDF or VF2), vinylidene fluoride (VDF) and hexafluoropropylene (HFP) as well as perfluoromethylvinylether (PMVE) containing specialty polymers. There are four families of Viton® polymers (A, B, F and G types), each with varying fluorine content, but all known for their superior performance.
Compared to most other elastomers, Viton® is better able to withstand high temperatures while still retaining its good mechanical properties. Its low compression set means it maintains its shape and elasticity even after prolonged use. It also has excellent oil and chemical resistance, which are essentially unaffected by elevated temperatures. Viton® grades also resist degradation from a wider variety of chemicals and fluids than any other non-fluorinated elastomer, including oils, fuels, lubricants, and most mineral acids.
What sets Viton® apart from other elastomers is its low permeability to such a broad range of substances, which means it provides the best fluid resistance of any commercial rubber. This makes Viton® tubing a popular choice in automotive and other transportation fuel applications, involving high concentrations of biodiesel. The material is especially resistant to atmospheric oxidation, sun, climatic conditions, fungus, and mould, making it a popular choice in a wide range of applications.
Viton® is a durable material for O-rings, gaskets, and seals, all of which can be specified and manufactured to bespoke requirements. However, it’s important to understand the requirements of your specific application and ensure that the right grade of Viton® is used, as different grades of Viton® have different strengths.
What about FKM & FPM?
FKM is the ASTM abbreviation for fluoroelastomers and FPM is the International designation to ISO. Both are abbreviations for fluoroelastomers!
Viton® Mouldings at Industrial Rubber
Industrial Rubber have been moulding Viton® compounds for a number of years and have a catalogue of compounds available in various colours. We can manufacture Viton® in compression, compression transfer and injection moulding and can bond Viton to metal. For more information on how we can help you with your Viton® mouldings please contact us.
