Elastomer Technology

Natural rubber NR - General grades

Natural rubber (NR)
Materials based on natural rubber have high strength and high resilience with good abrasion resistance.

Chemical properties
Natural rubbers are suitable for use in hot and cold water, ammonia, ethylene glycol, dilute acids and alkalis. They also have excellent resistance to silicone-based oils and greases.

Typical operating temperatures
-50°C to +100°C continuous, or +120°C intermittent.

Fluid sealing duties
The mechanical properties of natural rubber are still favoured by many end users where its chemical compatibilies are suitable. However, limited resistance to heat, weathering and the vast majority of oils, has greatly reduced the use of natural rubber in favour of synthetic elastomers.

James Walker standard grades
Supplied in hardnesses of 40-85 IHRD.

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