Technical data

Choose the compound the job actually needs

Every compound is good at something and bad at something else. NBR shrugs off oil but not sunlight; EPDM handles weather and hot water but swells in oil. This chart puts all 14 compounds we work with side by side, strengths and limits together.

← Scroll the table sideways for more compounds →

Property	NR NR	IR IR	BR BR	SBR SBR	NBR NBR	IIR IIR	EPR EPDM / EPR	CR CR	CSM CSM	FPM FKM / FPM	ACM ACM	U AU / EU	SI VMQ	CHR CO / ECO
Applicable hardness rangeShore A	20-100	20-100	30-100	30-100	30-100	20-80	30-90	30-90	30-90	60-90	40-80	30-100	30-90	30-100
Tensile strengthkg/cm²	30-300	30-200	30-200	30-200	30-200	30-150	30-200	30-250	30-200	70-150	30-120	150-450	30-80	30-190
Maximum temperature°C	120	120	120	120	130	150	150	150	150	300	190	80	280	130
Continuous temperature°C	70	70	70	70	90	110	110	100	110	200	150	70	200	110
Lowest temperature°C	-40	-40	-40	-40	-20	-40	-40	-20	-20	-20	-10	-20	-80	-40
Resilience	E	E	E	G	F	F	G	E	G	F	F	E	E	G
Abrasion resistance	E	G	E	G	G	F	G	G	G	G	G	E	F	G
Weather resistance	F	F	F	F	F	E	E	G	E	G	G	G	E	E
Ozone resistance	F	F	F	F	F	E	E	G	E	G	G	G	E	E
Electrical resistance	E	E	E	E	F	E	E	G	G	G	F	G	E	F
Gas permeability resistance	F	F	P	F	G	E	P	G	E	E	G	G	P	E
Water resistance	G	G	G	G	G	E	G	G	E	E	F	F	G	G
Oil and gasoline resistance	P	P	P	P	E	P	P	G	G	E	E	E	G	E
Animal and vegetable oil	G	G	G	G	E	E	G	G	G	G	E	G	G	E
Paraffinic solvent	P	P	P	P	E	P	P	G	G	E	E	G	F	E
Aromatic solvent	P	P	P	P	F	P	P	P	P	E	P	P	P	F
Ketone and ester	F	F	F	F	P	G	G	P	P	P	P	P	G	P
Dilute acid	G	G	G	G	G	E	E	G	E	E	F	F	E	G
Concentrated acid	F	F	F	F	F	E	E	G	E	E	F	P	E	G
Alkalinity resistance	G	G	G	G	G	G	G	G	G	F	F	P	F	G

E ExcellentG GoodF FairP Poor

These are general reference values for each polymer class under ASTM D2000. Actual figures depend on the recipe, the fillers and the cure. Tell us the real service conditions and we will recommend a specific compound.

The compounds

What each one is for

NR

Natural Rubber

Anti-vibration mounts, rollers, shock absorbing parts

Mixed in-house

IR

Isoprene Rubber

Substitute for NR where batch consistency matters

BR

Butadiene Rubber

Blended with other polymers to raise abrasion resistance

SBR

Styrene Butadiene Rubber

General parts, gaskets, pads with no oil contact

Mixed in-house

NBR

Nitrile Rubber

O-rings, oil seals, gaskets for fuel and oil systems

Mixed in-house

IIR

Butyl Rubber

Gas-tight seals, diaphragms, weatherproofing

EPR

EPDM / EPR

Ethylene Propylene Rubber

Sanitary parts, hot-water systems, outdoor weather seals

Mixed in-house

CR

Chloroprene Rubber (Neoprene)

Dust boots, cable covers, parts needing ozone and moderate oil resistance

Mixed in-house

CSM

Hypalon (CSM)

Chemical and concentrated-acid service, tank lining

FPM

FKM / FPM

Fluoroelastomer (Viton)

Seals to 300°C, aggressive fuel and chemical service

Mixed in-house

ACM

Polyacrylic Rubber

Transmission and engine oil seals at elevated temperature

U

AU / EU

Urethane Rubber

High tensile duty, rollers, hydraulic seals

SI

VMQ

Silicone Rubber

Electrical and food-grade parts, −80 to 280°C service

Mixed in-house

CHR

CO / ECO

Epichlorohydrin Rubber

Fuel systems requiring low permeation, automotive hoses and seals

A quick way to choose

Three questions that narrow it down

What does the part touch? Oil or fuel — start at NBR. Hot water, steam or sunlight — start at EPDM. Aggressive chemicals — go to FKM.
What temperature? Natural rubber tops out near 70°C continuous, NBR reaches 90°C, while silicone and Viton run to 200°C continuous.
How hard should it be? Most seals sit at 70 ± 5 Shore A. Raise it for high compressive load, drop it to conform to a rough face.

Let our technical team choose

The printed material property chart — The printed chart from our brochure — available on the downloads page

Start a project

Send us a drawing and we will quote it

Tell us the dimensions, the hardness you need, what the part will contact and your batch size. We will come back with a compound recommendation and a price.

Request a quote 02-899-2946-9