Gaskets and seals
Gaskets and seals
Table of Contents
Rubber gaskets and seals, plus rubber washers are designed to compress under pressure to seal any gaps between the faces of two meeting surfaces. Gaskets are also used in other applications such as vacuum sealing machines, where they make contact with the heating element when it needs to seal and because they are rubber they are flexible and will recover, so they can be used many times, but it must be remembered, they will wear out eventually.
We are a supplier and manufacturer of all types of rubber seals and gaskets both nationally and internationally. Because our pricing policy is based on centering out, where we deduct the cost of the centre, means you save money.
Renowned throughout the sealing industry for our knowledge in the sector and our team has over 100 years experience of providing sealing solutions. So, if your gasket requirement is out of the ordinary, we will work with you to create a custom designed seal suitable for your application by offering advice on polymer type, seal design and method of production.
In addition, we have over 15,000 cutting formes available and two oscillating knife CAD/CAM cutting tables you can be rest assured, delivery will be quick.
Simply give us a call or fill in the enquiry form below and one of our experts will give you all the advice and guidance to meet your rubber gasket requirements.
Rubber Gaskets Enquiry Form
Grades of rubber can vary significantly in terms of quality, therefore we only supply rubber manufactured to high standards, from reputable and reliable suppliers which means you get consistent quality.
Below we will explain about the different polymers that we offer and what they are suitable for, as chemical resistance and operating temperature vary depending on the type of rubber.
Types of Rubber Gaskets
Types of Rubber Gaskets
Click on the links below to download a data sheet on the different grades.
EPDM & Butyl
Butyl gaskets are used with corrosive chemicals like alkaline’s and mineral and aqueous acids. It has good heat resistance (up to 130° C) and excellent ageing properties. Butyl is also the only truly impermeable rubber.
GasketsEPDM seals are used in a wide variety of situations. They exhibit good resistance to alkali’s and acids. Commonly used for sealing against water, EPDM’s are also suitable for use with phosphate ethers and solvents.
This grade is suitable for use in food and beverage applications because it is compliant with FDA and EC1935:2004. It is resistant to many chemicals and ozone. It can be used at temperatures up to 115° C.
Hypalon & Natural
Hypalon™ is resistant to most inorganic chemical products. It has good resistance to general acids, oils, and greases. Also, it has excellent resistance to oxidation and ozone. CSM’s also resist fire and are self-extinguishing when the flame is removed.
SBR/Commercial gaskets are suitable for a variety of low-pressure seals. It has good resistance to many inorganic chemical products but limited resistance to mineral oils. SBR is not suitable for use with oxidising acids or general organic liquids.
WFQ Natural is suitable for a variety of sealing applications and food stuffs. All the ingredients in this formulation have been checked against the latest update of the CFR21 FDA 177-2600 ingredient listings and are present at the level permitted.
This high-grade range meets the BS Standard 1154. There are 5 grades described by their hardness Z40, Z50, Z60, Z70 and Z80. By using a BS grade such as this means you get consistency of supply as, no matter the manufacturer, the grade must comply.
The fibreglass or cloth insertion in this option means that the gaskets have additional strength and wont’s stretch as much as non-reinforced grades. Its chemical resistance properties are the same as SBR without the reinforcement.
Neoprene was one of the first synthetic polymers to be developed. It is resistant to inorganic chemical products except oxidising acids and halogens. It has good resistance to heat, ozone, and weathering. We also offer this grade with an insertion.
Our flame retardant Neoprene Gaskets give additional safety in the workplace. We offer several grades, NCB158 (National Coal Board Spec.) which is also anti-static. NFF16101 and UL94 VO Rated, plus ISO 340/BS490 Anti-Static, subject to minimum orders.
Our BS2752 range of Neoprene gaskets comply with the exacting British Standard to ensure your gaskets and seals always meet the same specification. The range covers 5 hardness’s from 40 Sh to 80 Sh, known as C40, C50, C60, C70, and C80.
Nitrile rubbers are resistant to various oils and can be used at relatively high temperatures. It should be noted though, that with the increase of Biofuel in petrol and diesel, care should be taken in these applications. A reinforced grade is also available.
This high grade Semperit material has good mechanical properties and is suitable for use with unleaded fuel with a swell rate of around 20% compared to a commercial Nitrile’s 60%. It is suitable for most aliphatic and aromatic oils.
Suitable for contact with dry foods means this oil resistant grade is mostly used within the food processing industry. Compliant with both EC1935:2004 regulations and CFR21 FDA 177-2600.
Blue gaskets are becoming increasingly popular for seals within the food industry because there are very few blue foods, making it easier to spot a gasket leak. This grade complies with EC1935:2004 and FDA regulations.
We manufacture Silicone gaskets in a range of colours. All our Silicone is WRAS approved and FDA/EC1935 compliant. Silicone is resistant to a wide range of general chemical products and can operate at high temperatures, +230° C Continuous, +250° C Intermittent.
Platinum cured silicone has better tensile and tear strength than peroxide cured silicone. It can also be made clearer because of the curing process which makes it the preferred material in medical, pharmaceutical and food sectors.
This softer grade of silicone is ideal for making gaskets and seals to be used in low pressure sealing applications. Because all silicones are inert, it makes them the preferred choice for many food and beverage processing plants.
Our blue FDA metal detectable silicone gaskets are used in food processing industries and the pharmaceutical sector. The grade has food safe particles within it that can be picked up by a metal detector in the event of seal failure.
Viton and FKM
Fluoroelastomers have some of the best chemical resistance amongst synthetic polymers. These FDA compliant grades are ideal for use in many environments, for instance, pharmaceutical, where there is exposure to harsh chemicals or solvents.
This speciality polymer is part of the Viton family of materials. Viton gaskets are usually used in situations where resistance to heat, fuels or chlorinated solvents is required. Viton has excellent resistance to hydrocarbons, aliphatics, aromatics, and chlorinated chemicals.
This Nomex reinforced FKM is used where additional strength is required in applications like diaphragms. It has a minimum fluorine content of 66% which means it is extremely chemical resistant and durable.
As with all types of rubber, it is recommended that the polymer type is tested for suitability as grades do vary.
We are happy to advise on any application, but final responsibility lies with the customer.
Viton A™ is a trademark of The Chemours Company