The Elastomeric Compounding Specialists

Providing unparalleled quality and technical advice since 1979.
Clwyd Compounders have over 40 years experience supplying quality compounds to a wide range of industries.

We understand rubber in-depth – from formulation to application – and can supply compounds to meet the most demanding of end-user specifications in industries ranging from oil & gas to food processing. We also understand the needs of downstream processors, working closely with our customers to ensure the compounds we supply process efficiently thus minimising waste.

Compound Selector Tools

Compound Selector Tools

Polymer Comparison Table

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


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 CFKM 2PFKM 3FKM 4FKM 5FKM LTFEPM TFKM 1FKM 2VMQPVMQFVMQACMAEMHNBRNBR LNBR MNBR HEPDMPUIIRBIIRCIIRXNBRCSM ECOBR SBR CRNBR/PVCNR IR
Type / ClassKKHKHKHKHKHKHKHKHKFC/FE/GEFE/GEFKEH/DH/DFEE/EF/EGDHBFBG/CHBK/CHAA/BA/CA/DBGAA/BAAA/BAAA/BABF/BG/BKCECHAAAA/BABE/CEBF/BG/BKAAAA
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-5 °C-25 °C-5 °C-10 °C-40 °C-9 °C-15 °C-10 °C-60 °C-70 °C-60 °C-60 °C-40 °C-25 °C-40 °C-30 °C-25 °C-55 °C-50 °C-50 °C-50 °C-50 °C-15 °C-25 °C-35 °C-60 °C-25 °C-40 °C-20 °C-40 °C-50 °C
ASTM 1 OilExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageAverageExcellentGoodExcellentExcellentGoodExcellentExcellentNoneExcellentNoneNoneNoneExcellentExcellentExcellentNoneNoneExcellentExcellentNoneNone
ASTM 2 OilExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageAverageExcellentGoodExcellentExcellentGoodExcellentExcellentNoneGoodNoneNoneNoneExcellentGoodExcellentNoneNoneGoodExcellentNoneNone
ASTM 3 OilExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageAverageExcellentGoodExcellentExcellentGoodExcellentExcellentNoneGoodNoneNoneNoneExcellentGoodExcellentNoneNoneGoodExcellentNoneNone
Liquid 101ExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentNoneNoneExcellentNoneNoneExcellentGoodGoodExcellentNoneGoodNoneNoneNoneExcellentNoneExcellentNoneNoneNoneExcellentNoneNone
Liquid 103ExcellentExcellentNoneNoneNoneNoneGoodGoodNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneGoodNoneGoodGoodGoodNoneNoneNoneNoneNoneNoneNoneGoodGood
Fuel AExcellentGoodExcellentExcellentExcellentExcellentGoodExcellentExcellentExcellentNoneNoneExcellentNoneNoneExcellentGoodGoodExcellentNoneGoodNoneNoneNoneGoodNoneExcellentNoneNoneAverageGoodNoneNone
Fuel BExcellentGoodExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentNoneNoneAverageNoneNoneGoodAverageGoodGoodNoneAverageNoneNoneNoneAverageNoneNoneNoneNoneNoneAverageNoneNone
TolueneExcellentGoodExcellentExcellentExcellentExcellentGoodExcellentExcellentExcellentNoneNoneGoodNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNone
MethanolExcellentExcellentExcellentGoodExcellentExcellentExcellentExcellentNoneGoodExcellentExcellentExcellentNoneNoneExcellentGoodGoodExcellentExcellentNoneExcellentExcellentExcellentExcellentExcellentGoodExcellentExcellentExcellentExcellentExcellentExcellent
KeroseneExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentNoneNoneExcellentExcellentExcellentExcellentGoodExcellentExcellentNoneExcellentNoneNoneNoneExcellentGoodExcellentNoneNoneGoodExcellentNoneNone
KetoneExcellentNoneGoodAverageNoneAverageAverageGoodNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneExcellentNoneNoneGoodGoodNoneNoneNoneNoneNoneAverageNoneNoneNone
Acid (weak)ExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentGoodGoodNoneNoneAverageGoodGoodGoodAverageAverageAverageGoodNoneGoodGoodGoodAverageGoodAverageAverageAverageGoodAverageAverageAverage
Acid (strong)ExcellentExcellentGoodAverageExcellentGoodGoodGoodAverageAverageNoneNoneNoneNoneNoneNoneNoneNoneNoneAverageNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNone
Base (weak)ExcellentExcellentNoneNoneNoneExcellentExcellentExcellentNoneNoneAverageAverageAverageNoneNoneGoodAverageAverageGoodExcellentNoneExcellentExcellentExcellentGoodGoodNoneGoodGoodGoodGoodGoodGood
Base (strong)ExcellentExcellentNoneNoneNoneGoodGoodGoodNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneNoneGoodNoneGoodGoodGoodNoneNoneNoneNoneNoneAverageNoneNoneNone
Hydrogen SulphideExcellentExcellentAverageNoneNoneGoodGoodExcellentNoneNoneAverageAverageAverageNoneNoneGoodNoneNoneNoneExcellentNoneExcellentExcellentExcellentNoneNoneGoodNoneNoneAverageNoneNoneNone
SteamExcellentExcellentAverageAverageNoneExcellentExcellentExcellentNoneNoneAverageAverageNoneNoneNoneAverageNoneNoneNoneExcellentNoneGoodGoodGoodNoneAverageNoneNoneNoneAverageNoneNoneNone
OzoneExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentGoodAverageAverageAverageExcellentExcellentGoodExcellentExcellentAverageExcellentExcellentNoneNoneGoodGoodNoneNone
RadiationExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentExcellentAverageAverageAverageGoodGoodGoodAverageAverageAverageExcellentAverageGoodGoodGoodAverageGoodGoodAverageAverageGoodGoodAverageAverage
Hardness range (Shore A) 70- 9560 - 9550 - 9560 - 9560 - 9560 - 9560 - 9560 - 9550 - 9550 - 9520 - 8550 - 8525 - 8525 - 8545 - 9050 - 9940 - 9540 - 9550 - 9525 - 9525 - 8535 - 8535 - 9035 - 9050 - 9540 - 8040 - 9040 - 9040 - 9535 - 9540 - 9530 - 9530 - 95
Minimum non-brittle temp -30 °C0 °C-30 °C-40 °C-10 °C-15 °C-45 °C-10 °C-20 °C-35 °C-80 °C-80 °C-80 °C-60 °C-60 °C-40 °C-55 °C-50 °C-45 °C-70 °C-80 °C-70 °C-70 °C-70 °C-30 °C-40 °C-45 °C-90 °C-50 °C-50 °C-30 °C-70 °C-70 °C
Tensile strength 15 Mpa25 Mpa20 Mpa20 Mpa20 Mpa20 Mpa20 Mpa23 Mpa20 Mpa20 Mpa11 Mpa8 Mpa9 Mpa20 Mpa20 Mpa30 Mpa24 Mpa26 Mpa28 Mpa23 Mpa30 Mpa18 Mpa18 Mpa18 Mpa25 Mpa23 Mpa20 Mpa20 Mpa25 Mpa23 Mpa20 Mpa25 Mpa23 Mpa
Elongation at break 250%250%250%300%250%250%300%300%300%250%600%500%400%450%350%450%500%450%400%450%600%>700%650%650%250%350%400%550%500%450%400%600%600%
  FFKMViewFEPM CViewFKM 2PViewFKM 3ViewFKM 4ViewFKM 5ViewFKM LTViewFEPM TViewFKM 1ViewFKM 2ViewVMQViewPVMQViewFVMQViewACMViewAEMViewHNBRViewNBR LViewNBR MViewNBR HViewEPDMViewPUViewIIRViewBIIRViewCIIRViewXNBRViewCSM ViewECOViewBR ViewSBR ViewCRViewNBR/PVCViewNR ViewIRView

Supplying High Quality Elastomeric
Compounds
and Technical Expertise
to meet rigorous customer requirements
and new industry standards

Technical Expertise

Testing to Specifications

Committed to Quality

Comprehensive Selection

Latest News

Compounding low temperature elastomers for extreme conditions

Compounding low temperature elastomers for extreme conditions View our webinar that took place on Friday 11th September. We looked into how to compound the optimum formulation to suit your low temperature application requirement. Parts which are likely to be exposed to…

COVID-19, Business Update

COVID-19, Business Update – March 2020 Clwyd is involved in the manufacture of elastomer materials used in several critical industries. Our rubber materials are used in essential life saving respiratory equipment supplied to Emergency Services, Government and Military organisations. Additionally,…
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