Compounds

We mould a full range of heat-curable elastomers, from natural rubbers through to perfluoroelastomers, and will advise you on the most suitable polymer for your application. If your requirement is for a specialist compound or needs development work, we also have a range of small scale equipment available for lab batches.

Working closely with some of the UK’s most experienced compounders who understand rubber in-depth – from formulation to application – we can supply compounds to meet the most demanding of end-user specifications in industries ranging from oil & gas to food processing.

As well as offering a complete range of materials from 20 – 95 Shore A, we can match many specifications including BS, WRAS, EC1935, FDA KTW and DTD. We can also produce your compound to match either RAL or PANTONE colours and offer a choice of fillers to make your compound metal detectable for food processing or pharmaceutical applications.

Compounds

Please click on the links below to download data sheets on our range of compounds.

Acrylic Ethylene Co-Polymer (AEM)
Good temperature range from -60° to +175° C, Excellent resistance to Ozone, Weathering and Acids.
Bromobutyl (BIIR)
Derivative of butyl rubber which has been reacted with bromine in a continuous process. It’s attributes include physical strength, vibration dampening, low permeability, and resistance to aging and weathering from environmental exposure.
Carboxylated Nitrile (XNBR)
Good resistance to oils and non-polar solvents. Improved tear strength and abrasion resistance cf. NBR.
Chlorobutyl (CIIR)
Low gas permeability, excellent  ozone resistance, good steam resistance, good fire resistance
Chlorosulphonated Polyethylene (CSM)
Often referred to under Dupont’s trade name of Hypalon, CSM has excellent resistance to oxidation and has outstanding resistance to atmospheric conditions, in particular strong sunlight and ozone.
Ethylene Propylene Diene Monomer (EPDM)
Excellent steam resistance, good ozone and weathering resistance, good low temperature flexibility, WRAS approved grades for potable drinking water applications and FDA compliant grades available.
Epichlorohydrin (CO, ECO)
Excellent ozone resistance, good resistance to oils, good fire resistance, very low permeability to gases – even better than Butyl.
Tetrafluoroethylene- propylene copolymer (FEPM C)
Fluorocarbon copolymer of tetrafluoroethylene and propylene. Excellent high temperature resistance, good resistance to oils and most non-polar solvents, excellent ozone and weathering resistance, excellent steam resistance.
Tetrafluoroethylene-perfluorovinylether-ethylene terpolymer (FEPM T)
Fluorocarbon terpolymer of tetrafluoroethylene, perfluorovinylether and ethylene, which has been designed for use in extreme environments. Outstanding chemical resistance (including acids & bases), excellent resistance to oils and non-polar solvents
Fluoroelastomer copolymer (FKM1)
Type 1 FKM’s are fluorocarbon co-polymers based on vinylidene fluoride and hexapropylene fluoride. Excellent high temperature resistance, good resistance to oils and most non-polar solvents, excellent ozone and weathering resistance.
Fluoroelastomer terpolymer(FKM2)
Type 2 FKM are fluorocarbon terpolymers based on vinylidene fluoride, tetrafluoroethylene fluoride and hexapropylene fluoride. This grade is cured using bisphenol. Excellent high temperature resistance, good resistance to oils and most non-polar solvents.
Peroxide-cured fluoroelastomer terpolymer(FKM 2P)
Type 2 FKM are fluorocarbon terpolymers based on vinylidene fluoride, tetrafluoroethylene fluoride and hexapropylene fluoride. This grade is cured using peroxide. Excellent high temperature resistance, good resistance to oils and most non-polar solvents.
Fluoroelastomer terpolymer containing fluorinated vinyl ether(FKM3)
Type 3 FKM are peroxide-cured fluorocarbon polymers designed for use in low temperature applications. Min. temp. for sealing applications. (-25°C). Minimum non-brittle  temp. (-40°C).
Fluoroelastomer terpolymer of tetrafluoroethylene, propylene & vinylidene fluoride(FKM4)
Bisphenol-cured fluoroelastomer terpolymer of tetrafluoroethylene, propylene & vinylidene fluoride. Not widely used; some use for specialist automotive parts.
Fluoroelastomer pentamer containing tetrafluoroethylene & fluorinated vinyl ether(FKM5)
Type 5 FKM are fluorocarbon pentapolymers which show improved base resistance compared to most other fluorocarbon polymer types. Typically used in automotive applications where high pH conditions are expected.
Fluoroelastomer pentamer containing fluorinated vinyl ether & methyloxyfluoroether(FKMLT)
Very low temperature FKM containing a methyloxyfluoroether monomer in their structure, resulting in improved chemical resistance and improved low temperature performance compared to standard low-temperature (Type 3) FKM. Min. temp. for sealing applications. (-40°C). Minimum non-brittle  temp. (-45°C).
Fluorosilicone (FVMQ)
Excellent resistance to high and low temperatures, excellent ozone resistance, excellent compression set resistance, good resistance to oils and most non-polar solvents. Available in a wide range of Shore hardnesses from 25 – 90 Sh. A.
Hydrogenated Nitrile rubber (HNBR)
Hydrogenated (≥ 90% saturation) version of acrylonitrile-butadiene rubber, which shows improved stability and physical properties compared to standard NBR. HNBR fill the gap between NBR and the more expensive FKM’s offering better performance with oils, heat and ozone than NBR’s, at a lower cost than FKM’s.
Natural Rubber (NR)
High tensile strength, good resilience and abrasion properties, excellent compression set resistance, excellent dynamic and rebound properties. Good low temperature range, able to seal down to -50°C.
Nitrile Butadiene High/Medium/Low ACN Rubber (NBR)
Copolymer of acrylonitrile and butadiene. The oil resistance and low temperature properties of the compounded material can vary considerably, depending on the acrylonitrile content of the base polymer.
Perfluoroelastomer (FFKM)
Perfluoroelastomers are fully-fluorinated fluorocarbon polymers which have elastomeric characteristics. Outstanding high temperature and chemical resistance, excellent ozone and weathering resistance, excellent steam resistance.
Phenyl Silicone (PVMQ)
Terpolymer from phenylmethyl, vinylmethyl, and dimethylsiloxane (VMQ) in which a part of the methyl groups is replaced by phenyl groups.
Polyacrylate Rubber (ACM)
Copolymer of ethyl and butyl acrylate. Excellent resistance to petroleum fuel and oil, good heat resistance, good ozone resistance.
Polybutadiene Rubber (BR)
Good tensile strength, good low temperature performance. Min. temp. for sealing applications(-60°C): Minimum non-brittle  temp.(-90 °C):
Polychloroprene Rubber (CR)
Commonly referred to as Neoprene, Chloroprene’s have high tensile strength and resilience, excellent ozone and weathering resistance and good resistance to oils.
Polyisoprene Rubber (IR)
Synthetic Polyisoprene rubber. It has high tensile strength and good resilience. Chemically similar to Natural rubber (NR), IR has lower strength, but there is less chance of impurities compared to NR.
Polyurethane (PU/AU/EU)
Millable polyurethane (Pu), which may contain an ester group (AU) or an ether group (EU). Excellent tensile strength and anti-abrasion properties, excellent ozone resistance and good resistance to oils.
Nitrile Butadiene Rubber/PVC blend (PVC/NBR)
Blend of polyvinyl chloride and acrylonitrile butadiene rubber to give good resistance to oils and improved ozone resistance over NBR.
Silicone (VMQ)
Polydimethylsiloxane containing methyl (MQ) or vinyl (VMQ). Silicone rubber is physiologically inert, thus making it the preferred choice of the medical, pharmaceutical and food processing industries.
Styrene-Butadiene Rubber (SBR)
Co-polymer of styrene and butadiene. High tensile strength, good resilience and high water resistance.

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