Natural Rubber (NR)
Natural Rubber (NR) compounds from Mountville Rubber provide high tensile strength, elasticity, and dynamic resilience, making them ideal for vibration and impact absorption. NR is widely used in applications such as vibration pads and conveyor components where toughness and flexibility are required. With its excellent tear strength and fatigue resistance, natural rubber remains one of the most dependable elastomers for demanding industrial use.
Available in sheets, slabs, and strips.
Abbreviation:
NR
ASTM D-2000 Classification:
AA
Chemical Definition:
Polyisoprene
Physical & Mechanical Properties
- Durometer or Hardness 30 - 95 Shore A
- Tensile Strength 200 - 3500 PSI
- Elongation % 300% - 900%
- Abrasion Resistance Good to Excellent
- Adhesion to Metal Excellent
- Adhesion to Rigid Materials Excellent
- Compression Set Excellent
- Flex Cracking Resistance Excellent
- Impact Resistance Good to Excellent
- Resilience/Rebound Excellent
- Tear Resistance Good to Excellent
- Vibration Dampening Good to Excellent
Thermal Properties
- Low Temperature -20° F to -70° F
- Minimum for Continuous Use (static) -60° F
- Brittle Point -80° F
- High Temperature +180° F to 220° F
- Maximum for Continuous Use (static) +180° F
Environmental Performance
- Colorability Poor
- Flame Resistance Fair to Good
- Gas Permeability Fair to Good
- Odor Good to Excellent
- Ozone Resistance Poor
- Oxidation Resistance Good
- Radiation Resistance Fair to Good
- Steam Resistance Good
- Sunlight Resistance Poor to Fair
- Taste Retention Fair to Good
- Weather Resistance Poor to Fair
- Water Resistance Excellent
Chemical Resistance
- Acids, Dilute Fair to Excellent
- Acids, Concentrated Poor to Good
- Acids, Organic (Dilute) Fair to Good
- Acids, Organic (Concentrated) Good
- Acids, Inorganic Good
- Alcohols Good to Excellent
- Aldehydes Good
- Alkalies, Dilute Fair to Excellent
- Alkalies, Concentrated Fair to Good
- Amines Poor to Fair
- Animal & Vegetable Oils Poor to Good
- Brake Fluids, Non-Petroleum Based Good
- Diester Oils Poor
- Esters, Alkyl Phosphate Poor
- Esters, Aryl Phosphate Poor
- Esters Poor
- Fuel, Aliphatic Hydrocarbon Poor
- Fuel, Aromatic Hydrocarbon Poor to Fair
- Fuel, Extended (Oxygenated) Poor
- Halogenated Solvents Poor
- Hydrocarbon, Halogenated Poor
- Ketones Fair to Good
- Lacquer Solvents Poor
- LP Gases & Fuel Oils Poor
- Mineral Oils Poor
- Oil Resistance Poor
- Petroleum Aromatic Poor
- Petroleum Non-Aromatic Poor
- Refrigerant Ammonia Good
- Refrigerant Halofluorocarbons R-12, R-13
- Refrigerant Halofluorocarbons with Oil Poor
- Silicone Oil Good
- Solvent Resistance Poor
