We are a custom Rubber Compounds specialist

At Clwyd Compounders, we have over 40 years of experience supplying high-quality custom rubber compounds to a wide range of different industries.
We’ve been providing unparalleled quality and technical advice since 1979.

Here at Clwyd Compounders, we understand rubber and polymer compounding in-depth – from formulation to application. We supply the highest quality rubber compounds to meet the most demanding of end-user specifications in industries ranging from oil & gas and nuclear to food processing.

From a modification to an existing rubber compound to suit your process needs, or if you are interested in starting a new project from scratch, we can provide the service and guidance you need to achieve your end result.

We also understand the needs of downstream processors, and work closely with our customers to ensure the rubber compounds we supply process efficiently and minimise waste.

Do you need help selecting your rubber compound?
If so, we have a selector tool designed to help you.

Alternatively, you can reach out to our Technical Experts today who will be more than happy to help.

Why should you choose us at Clwyd Compounders? Learn more about our history and expertise here.

OFFERING A FULL COMPOUNDING SERVICE
Polymer Comparison Table

Refine your ideal polymer, by reviewing all their attributes side-by-side

Open Selector Table
Polymer Selector
These values are purely indicative they can vary depending on the part manufactured and the operating environment.
Please contact us to be advised on the best solution to meet your requirements.
Scroll across to see all polymers...
No standard polymers match your criteria - please contact us
ASTM ClassificationDefine your requirementsFFKMFEPM CFEPM TFKM LTFKM 5FKM 4FKM 3FKM 2PFKM 2FKM 1FVMQPVMQVMQAEMHNBRACMEPDMNBR LNBR MNBR HPUCIIRBIIRIIRXNBRCSMECONBR/PVCCRSBR BR IRNR
Type / ClassKKHKHKHKHKFKM4HKHKHKHKFKFE/GEFC/FE/GEEE/EF/EGDHEH/DH/DFAA/BA/CA/DBFBG/CHBK/CHBGAA/BAAA/BAAA/BABF/BG/BKCECHBF/BG/BKBE/CEAA/BAAAAAAA
Upper service temp320 °C300 °C250 °C250 °C250 °C250 °C250 °C250 °C240 °C240 °C225 °C225 °C225 °C175 °C175 °C175 °C150 °C150 °C150 °C150 °C150 °C130 °C130 °C130 °C125 °C125 °C125 °C100 °C100 °C100 °C100 °C80 °C80 °C
Lower service temp-20 °C0 °C-9 °C-40 °C-10 °C-5 °C-25 °C-5 °C-10 °C-15 °C-60 °C-70 °C-60 °C-40 °C-25 °C-60 °C-55 °C-40 °C-30 °C-25 °C-50 °C-50 °C-50 °C-50 °C-15 °C-25 °C-35 °C-20 °C-40 °C-25 °C-60 °C-50 °C-40 °C
ASTM 1 OilExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageAverageExcellentExcellentGoodNoneGoodExcellentExcellentExcellentNoneNoneNoneExcellentExcellentExcellentExcellentExcellentNoneNoneNoneNone
ASTM 2 OilExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageAverageExcellentExcellentGoodNoneGoodExcellentExcellentGoodNoneNoneNoneExcellentGoodExcellentExcellentGoodNoneNoneNoneNone
ASTM 3 OilExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageAverageExcellentExcellentGoodNoneGoodExcellentExcellentGoodNoneNoneNoneExcellentGoodExcellentExcellentGoodNoneNoneNoneNone
Liquid 101ExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentNoneNoneNoneExcellentNoneNoneGoodGoodExcellentGoodNoneNoneNoneExcellentNoneExcellentExcellentNoneNoneNoneNoneNone
Liquid 103ExcellentExcellentGoodGoodNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneGoodNoneNoneNoneNoneGoodGoodGoodNoneNoneNoneNoneNoneNoneNoneGoodGood
Fuel AExcellentGoodExcellentGoodExcellentExcellentExcellentExcellentExcellentExcellentExcellentNoneNoneNoneExcellentNoneNoneGoodGoodExcellentGoodNoneNoneNoneGoodNoneExcellentGoodAverageNoneNoneNoneNone
Fuel BExcellentGoodExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageNoneNoneNoneGoodNoneNoneAverageGoodGoodAverageNoneNoneNoneAverageNoneNoneAverageNoneNoneNoneNoneNone
TolueneExcellentGoodExcellentGoodExcellentExcellentExcellentExcellentExcellentExcellentGoodNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNone
MethanolExcellentExcellentExcellentExcellentExcellentExcellentGoodExcellentGoodNoneExcellentExcellentExcellentNoneExcellentNoneExcellentGoodGoodExcellentNoneExcellentExcellentExcellentExcellentExcellentGoodExcellentExcellentExcellentExcellentExcellentExcellent
KeroseneExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentNoneNoneExcellentExcellentExcellentNoneGoodExcellentExcellentExcellentNoneNoneNoneExcellentGoodExcellentExcellentGoodNoneNoneNoneNone
KetoneExcellentNoneGoodAverageAverageNoneAverageGoodNoneNoneNoneNoneNoneNoneNoneNoneExcellentNoneNoneNoneNoneGoodGoodNoneNoneNoneNoneNoneAverageNoneNoneNoneNone
Acid (weak)ExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentGoodGoodAverageNoneNoneGoodGoodGoodGoodAverageAverageAverageNoneGoodGoodGoodAverageGoodAverageAverageGoodAverageAverageAverageAverage
Acid (strong)ExcellentExcellentGoodGoodGoodExcellentAverageGoodAverageAverageNoneNoneNoneNoneNoneNoneAverageNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNone
Base (weak)ExcellentExcellentExcellentExcellentExcellentNoneNoneNoneNoneNoneAverageAverageAverageNoneGoodNoneExcellentAverageAverageGoodNoneExcellentExcellentExcellentGoodGoodNoneGoodGoodGoodGoodGoodGood
Base (strong)ExcellentExcellentGoodGoodGoodNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneGoodNoneNoneNoneNoneGoodGoodGoodNoneNoneNoneNoneAverageNoneNoneNoneNone
Hydrogen SulphideExcellentExcellentExcellentGoodGoodNoneNoneAverageNoneNoneAverageAverageAverageNoneGoodNoneExcellentNoneNoneNoneNoneExcellentExcellentExcellentNoneNoneGoodNoneAverageNoneNoneNoneNone
SteamExcellentExcellentExcellentExcellentExcellentNoneAverageAverageNoneNoneNoneAverageAverageNoneAverageNoneExcellentNoneNoneNoneNoneGoodGoodGoodNoneAverageNoneNoneAverageNoneNoneNoneNone
OzoneExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentGoodExcellentExcellentAverageAverageAverageExcellentExcellentExcellentGoodAverageExcellentExcellentGoodGoodNoneNoneNoneNone
RadiationExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageAverageAverageGoodGoodGoodExcellentAverageAverageAverageAverageGoodGoodGoodAverageGoodGoodGoodGoodAverageAverageAverageAverage
Hardness range (Shore A) 70- 9560 - 9560 - 9560 - 9560 - 9560 - 9560 - 9550 - 9550 - 9550 - 9525 - 8550 - 8520 - 8545 - 9050 - 9925 - 8525 - 9540 - 9540 - 9550 - 9525 - 8535 - 9035 - 9035 - 8550 - 9540 - 8040 - 9040 - 9535 - 9540 - 9540 - 9030 - 9530 - 95
Minimum non-brittle temp -30 °C0 °C-10 °C-45 °C-15 °C-10 °C-40 °C-30 °C-35 °C-20 °C-80 °C-80 °C-80 °C-60 °C-40 °C-60 °C-70 °C-55 °C-50 °C-45 °C-80 °C-70 °C-70 °C-70 °C-30 °C-40 °C-45 °C-30 °C-50 °C-50 °C-90 °C-70 °C-70 °C
Tensile strength 15 Mpa25 Mpa23 Mpa20 Mpa20 Mpa20 Mpa20 Mpa20 Mpa20 Mpa20 Mpa9 Mpa8 Mpa11 Mpa20 Mpa30 Mpa20 Mpa23 Mpa24 Mpa26 Mpa28 Mpa30 Mpa18 Mpa18 Mpa18 Mpa25 Mpa23 Mpa20 Mpa20 Mpa23 Mpa25 Mpa20 Mpa23 Mpa25 Mpa
Elongation at break 250%250%300%300%250%250%300%250%250%300%400%500%600%350%450%450%450%500%450%400%600%650%650%>700%250%350%400%400%450%500%550%600%600%
  FFKMViewFEPM CViewFEPM TViewFKM LTViewFKM 5ViewFKM 4ViewFKM 3ViewFKM 2PViewFKM 2ViewFKM 1ViewFVMQViewPVMQViewVMQViewAEMViewHNBRViewACMViewEPDMViewNBR LViewNBR MViewNBR HViewPUViewCIIRViewBIIRViewIIRViewXNBRViewCSMViewECOViewNBR/PVCViewCRViewSBR ViewBR ViewIRViewNR View

We deliver quality and consistency through our technical expertise in rubber compounds, meeting rigorous customer requirements, and new industry standards.

Technical Expertise

Testing to Specifications

Committed to Quality

Comprehensive Selection

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