Types of Flanges

Businesses in a variety of industries rely on flanges to join pipes or components together or to keep equipment secured to a surface. When it comes to choosing the best types of flange for your processes, you’ll want to take the time to research the different options...

Threaded Flange

Threaded flanges are probably the most recognisable of all flanges due to their screw thread design that is used to connect it to the pipe. Threaded flanges, also known as screwed flanges (for obvious reasons), require a male and female thread to create a connection...

Slip On Flange

A slip-on flange can also be known as a hubbed flange, which, as the name suggests, has a hub with a very low profile. Why is this important? Because this type of ring type joint gasket has an internal diameter larger than the connecting pipe, allowing you to slide it...

Weld Neck Flange

Also known as tapered hub flanges or high hub flanges, weld neck flanges are a specific type of gasket with a protruding ridge and long neck used to connect pipework and provide you with a high-quality seal. Weld neck flanges, in particular, are a popular choice when...

Nitrile vs Viton® – What is the Difference?

As you start to make a decision about what type of O-rings to purchase for your business, you might wonder what material is the most suitable for your unique needs. Every business operation has different requirements for their O-rings, such as the temperature,...

Aflas vs Viton

When it comes to choosing O ring suppliers in the UK, you’ll find that there are a wide range of materials on offer for you to choose from. Many people find that the options can seem quite overwhelming, with some materials having similar properties but offering...

EPDM Gasket

Both the automotive and construction industries have started to use EPDM gaskets more frequently in recent times. This rubber material is UV light resistant and has many fantastic properties that make this part highly effective for a wide range of processes. Keep...

Metal Gaskets

When comparing gaskets for use within your business processes, you’ll find that these can be made from a variety of materials. Metal gaskets are a very popular option, offering many advantages over other materials. When looking at sealing product options, make sure...

AFLAS o ring

O rings come in many different dimensions, thicknesses, and materials. And it is the various different materials that o rings can be manufactured from that make each o ring unique and suitable for specific applications. In fact, there are hundreds of different types...

O Ring Vulcanization Process

With years of o ring knowledge and experience in o ring vulcanization, we're one of the leading experts in providing the right sealing solution for you. To view our full range, visit our O-ring product page, with a wide selection and something to match every...

See our latest catalogue for all the services we offer.

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 application.

We want to make sure that all of our clients get a high-quality, compliant product that is durable, effective, and practical when it comes to cost and maintenance levels.

One of the most cost-effective and most popular o rings offering a whole host of benefits is that of silicone rubber o rings.

Known for their flexibility and low compression characteristics, silicone o rings are often the seal of choice for applications within the medical, aerospace, automotive, and electronics industries.

In this post, we take a look at some of the main benefits and what this particular type of o-ring can bring to your application.

Silicone O Rings Complete Guide

Silicone o rings UK

Silicone o rings are one of the most widely used types of sealing element due to their effective sealing capabilities and suitability to numerous industries; they’re also simple to use and offer good value for money.

Due to its flexible nature, silicone sealing is also considered the industry standard and the `go-to` o ring choice for many manufacturers.

Silicone compound materials, such as carbon, hydrogen, and oxygen, along with a silicone base polymer, are used to produce a range of general-purpose o rings, all providing good to average levels of strength (you will find various grades of o rings available; the grade you choose will be dependant on your exact requirements). Depending on requirements and specifications, these types of o-rings can also be formulated to include inert fillers.

With excellent weathering capabilities, resistance to ozone, acid, and heat, as well as being non-reactive, stable, and cost-effective to manufacture, silicone is a durable choice.

Benefits of silicone o rings

Wide temperature range

Silicone rubber o rings are an incredibly practical solution when applications are operating with various low and high-temperature ranges. Able to withstand and maintain their shape and performance, silicone o rings are an excellent choice for 99.9% of environments in which they are placed.

They can maintain their high performance in temperatures ranging from -75 degrees Celsius up to 230 degrees Celsius, with some newer polymers able to still operate in temperatures up to 315 degrees Celsius.

Excellent flexibility

Due to the elasticity of this type of o ring, even in the lowest of temperature ranges, silicone o rings keep their flexibility, providing you with peace of mind that they will always perform at their best.

Silicone o rings also maintain their flexibility and composure when exposed to certain chemicals, i.e., alkali and acid elements.


When silicone o rings are stored correctly (in clean and dry spaces away from direct sunlight and UV rays), they can last boundless years. This is important to bear in mind as the silicone counterpart Nitrile o rings may only have a lifespan of 15 years.

Reducing ongoing maintenance requirements and the need for replacement.

Low compression set

Silicone o rings can still perform at high pressures and temperatures due to the makeup of their material.

Available in a choice of colour

This may not be a big selling point; however, for some applications, having this choice is required, especially for consumer-facing applications.

Available from o ring suppliers in red, green, blue, and clear, no matter the colour you choose, the strength of the material is not compromised; you can simply choose the one that is best suited to your application.


For all we have mentioned, the advantages of using silicone o rings, this material choice does come with some weaknesses, which you should be aware of.

For example, this type of o ring has poor tensile strength and low shear strength. It isn’t resistant to abrasion, and also has low impermeability.

This makes silicone o rings unsuitable for applications that involve steam or oil.

O Ring Supplier UK

Silicone o rings can provide you with a tremendous general-purpose sealing option, with this type of o ring particularly suited to internal sealing applications.

At SSP, we’re always on hand to help you with the most suitable o-ring type for your application, and as well as a range of grades of silicone o-rings, we also stock PTFE, Nitrile, and Fluorocarbon as viable alternatives.

All of our seals and gaskets are compliant with relevant industry standards and guidelines. If you’re looking for a general-purpose sealant for your application, contact us today at 01535 274 776 or email the requirements of your application to, and we’ll make sure to come back to you with the best solutions.

Read the next article: O ring Vulcanization process



Contact Us
close slider