Oil Seal Types

We can't emphasise enough how important it is to choose the right oil seal to keep your application functioning, and functioning well. Not every oil seal is the same. Manufactured using various material elastomers and to suit a range of dimensions, seals are as unique...

Rotary Shaft Seals

Rotary shaft seals are the more formal name for this type of seal; however, we also know them as oil, grease, fluid, or dirt seals. Whatever you call them however, they all perform the same function – to close the space between stationary and moving parts in machinery...

Silicone O Rings

As a leading O ring UK manufacturer and supplier of high quality seals and gaskets, offering a wide range of types, sizes, and sealing solutions that suit various applications across all industries, we work hard to ensure you get the best sealing solution for your...

Viton O Rings

Viton o rings bring with them numerous advantages, especially for applications within high-tech and critical industries. Providing great resistance to wide fluctuations in temperature and chemical ranges as well as being wholly suitable for pressure applications,...

How are O Rings made?

O rings are one of the most common components within manufacturing. Suitable for a range of applications and found in numerous everyday appliances, o rings are a vital piece of equipment to provide the perfect sealing solution. Ring-shaped seals, o rings are made up...

Pipe Gasket

A pipe gasket is designed to seal a space between two sections of a pipe. Many pipes have flanged surfaces where they join, which means it isn’t smooth or flat to make this connection secure. In order to overcome this flared area, a flange gasket will be used to...

Spiral Wound Graphite Fill Gasket

With so many different gasket options on offer today, we know it can be difficult deciding which ones have the right features for your needs. Each type of gasket is suitable for a variety of applications or uses, and the material that your gasket is made from will...

Gasket Cutting

Using the latest technology and equipment, gasket cutting today offers incredible precision. Achieving customised gaskets that meet your sealing requirements, today we’re now seeing various gasket cutting techniques used as we move away from the standard dimensions...

What are Bonded Seals?

As you start to compare the seals on offer on our site, you’ll find that there are many different options for a variety of uses. Bonded seals are a great solution for some applications, offering many benefits over other types of seals. Specialist Sealing Products...

Rubber Gasket Material

Rubber gaskets are a very valuable solution for a variety of uses, however, you’ll want to make sure you always choose the right option for your unique business operations. There are a variety of rubber gasket materials on offer, which provide you with an effective...

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Is fluorosilicone rubber o rings a sustainable choice?

Is fluorosilicone rubber o rings a sustainable choice

Fluorosilicone rubber, also known as FVQM or MFQ, contains 23-28% fluorine and has nearly the same physical and mechanical properties as standard silicone rubber as matches on par with their flexibility at low temperatures. 

However, due to its fluorine content, fluorosilicone rubber does offer better resistance to oils and fuels, and it also provides a good level of resistance to swelling. 

When it comes to fluorosilicone rubber temperature range, it’s important to note that the operating temperature range in fluorosilicone is reduced slightly, but only slightly, and we will come on to this further in this blog post. 

As the leading o ring supplier in Leeds, if you have any questions relating to o rings, seals and gaskets, speak to a member of our professional team today – call 01535 274 776.

Benefits of fluorosilicone rubber 

Often opted for when the working environment is considered “harsh,” you will find fluorosilicone rubber o rings used in more and more applications due to the numerous benefits this material can provide.  For example, you will find this type of o ring found in automotive, fuel emissions, petroleum oil applications, solvent environments, environments with broad temperature ranges, and more. 

Fluorosilicone rubber properties: 

  • It has a temperature range from -60 degrees Celsius to 205 degrees Celsius. 
  • Have a hardness range from 40 to 80 Shore A. 
  • Can maintain its tensile strength. 
  • Remain flexible at all times. 
  • Have excellent compression set resistance.

Fluorosilicone material properties are: 

  • Resistant to oils, fuels, chemicals, and solvents (great for static seals). 
  • Resistant to extreme temperature ranges (making them great in fuel systems where temperatures can reach 220 degrees Celsius) 
  • Flexible at low temperatures 
  • Resistant to weather and high ozone levels 
  • Resilient to rebounding 
  • Resistant to petroleum oils and hydrocarbon fuels 
  • Resistant to water, ageing, and bacteria 
  • It can be compression moulded, injected, extruded, and calendared into o rings, gaskets, tubing, and other seals. 

Fluorosilicone rubber also has good mechanical and dielectric properties, helping engineers who opt to use these elastomers deliver a more suitable, sustainable, and innovative solution to sealing requirements. 

Due to its resistance to solvents, this material is ideal for specific applications where you require a general resistance to a range of chemicals and solvents.   

Fluorosilicone rubber also continues to perform even when placed under extreme temperature ranges, with FFKM o rings offering you higher thermal and chemical resistance than standard o rings – great when working with chemical applications. 

We also must emphasise the resilience again that fluorosilicone rubber properties provide.  

Offering a low compression set, this elastomer will not deform under strain and compression, keeping the seal intact and hence reducing the risk of leaks.  Providing you with reliability and durability across a range of applications, even those that prove to be the most challenging. 

Primarily, you will find this type of material in the automotive and aerospace sectors, with medical and pharmaceutical sectors now following their lead as they are also beginning to see the benefits this material provides, especially when it comes to its resistance to bacterial growth! 

Due to the nature and composite of its properties, fluorosilicone rubber is suitable for: 

  • Medical tubing 
  • Seals and engine gaskets 
  • Air pump valves 
  • O rings 
  • Full line seals 
  • Leak detection seals 
  • And much more. 

Cons of fluorosilicone rubber 

Fluorosilicone has low tensile strength and high gas permeability.  It also suffers from low tear strength and poor abrasion resistance. 

These elements combined mean fluorosilicone is often not suitable for dynamic sealing. 

They can also be expensive compared to standard silicone.  This is because the makeup of fluorosilicone is difficult and time-consuming when we examine the vulcanisation process in more detail; this drives up production costs and overall expense
For all fluorosilicone rubber has a high chemical resistance, it’s important to be aware that it is not resistant to everything.  For example, fluorosilicone rubber will not perform well with brake fluids, ketones, hydrazine, and amines. 

Further information 

It’s important that you get the right compound to fit your requirements and specifications perfectly.  

The right seal can ensure that your application suffers from no leaks or gases escaping.   

Due to this material’s various benefits, fluorosilicone is an attractive option when matched with the correct application. 

If you need help choosing the right o ring and seal for your application, call the specialist o ring supplier Leeds on 01535 274 776 today or email us at for further information.

Must read: O rings for the Beer Industry



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