neoprene rubber part samplesNeoprene Rubber Products

Physical & Mechanical Properties / Chemical Resistance / Thermal Properties / Environmental Performance / Neoprene Rubber Applications

What is Neoprene Rubber?

Neoprene Rubber or Polychloroprene (CR) is a versatile synthetic rubber with exceptional resistance to oil, petroleum, and weathering. It also offers good UV, ozone and chemical stability; flexibility over a wide temperature range, and superior abrasion resistance. Neoprene is often found in laptop sleeves, electrical insulation, automotive fan belts, and various other industries and applications.

Neoprene production involves the free-radical polymerization of chloroprene. In commercial production, however, it is prepared by free-radical emulsion polymerization. Chloroprene polymerization is initiated with potassium persulfate. Bifunctional nucleophiles, metal oxides, and thioureas are then used to cross-link individual polymer strands.

Although natural rubber offers better mechanical properties, Neoprene’s resistance to degradation is far better than both natural and synthetic rubber. As a result, it is ideal for particularly demanding applications: gaskets, hoses, tubing, corrosion-resistant coatings.

Advantages of Neoprene Rubber

  • Exceptional physical toughness
  • Heat resistance
  • Hydrocarbon oil resistance
  • Sun, ozone and weathering resistance
  • Wide temperature range for continuous use
  • Superior flame retardant properties relative to hydrocarbon-based elastomers
  • Resistance to twisting and flexing damage
  • Versatile compounding capabilities

Properties of Neoprene Rubber

  • ASTM D-2000 Classification BC, BE (Standard Classification System for Rubber Products in Automotive Applications)
  • Chemical Definition: Polychloroprene
  • Abbreviations: CR


  • Transfer Molding
  • Injection Molding
  • Compression Molding

Physical & Mechanical Properties

  • Durometer: 20 – 95 Shore A
  • Tensile Strength: 500 – 3,000 PSI
  • Elongation (Range %): 100% – 800%
  • Abrasion Resistance: Very Good – Excellent
  • Adhesion to Metal: Excellent
  • Adhesion to Rigid Materials: Good – Excellent
  • Compression Set: Poor – Good
  • Flex Cracking Resistance: Good
  • Impact Resistance: Good – Excellent
  • Resilience & Rebound: Fair – Good
  • Tear Resistance: Good – Excellent
  • Vibration Dampening: Good – Excellent

Chemical Resistance

  • Dilute Acids: Excellent
  • Concentrated Acids: Poor
  • Organic Acids (Dilute): Good – Excellent
  • Organic Acids (Concentrated): Poor – Good
  • Inorganic Acids: Good – Excellent
  • Alcohols: Excellent
  • Aldehydes: Poor – Fair
  • Dilute Alkalies: Good
  • Concentrated Alkalies: Poor
  • Amines: Poor – Good
  • Animal & Vegetable Oils: Good
  • Non-Petroleum Brake Fluids: Fair
  • Diester Oils: Poor
  • Alkyl Phosphate Esters: Poor
  • Aryl Phosphate Esters: Poor – Fair
  • Ethers: Poor
  • Aliphatic Hydrocarbon Fuels: Poor – Good
  • Aromatic Hydrocarbon Fuels: Poor – Fair
  • Extended Fuels (Oxygenated): Fair
  • Halogenated Solvents: Poor
  • Halogenated Hydrocarbon: Poor
  • Ketones: Poor – Fair
  • Lacquer Solvents: Poor
  • LP Gases & Fuel Oils: Good
  • Mineral Oils: Fair – Good
  • Oil Resistance: Fair
  • Aromatic Petroleum: Good
  • Non-Aromatic  Petroleum: Good
  • Ammonia Refrigerant: Excellent
  • Refrigerant Halofluorocarbons: R-11, R-12, R-13, R-21, R-22
  • Refrigerant Halofluorocarbons with Oil: R-11, R-12, R-22
  • Silicone Oil: Fair – Excellent
  • Solvent Resistance: Fair

Thermal Properties

  • Low Temperature Range: -70ºF – -30ºF
  • Minimum for Continuous Use (Static): -80ºF
  • Brittle Point: -85ºF
  • High Temperature Range: +200ºF – +250ºF
  • Maximum for Continuous Use (Static): +250ºF

Environmental Performance

  • Colorability: Fair
  • Flame Resistance: Fair – Good
  • Gas Permeability: Fair – Good
  • Odor: Fair – Good
  • Ozone Resistance: Good – Excellent
  • Oxidation Resistance: Good – Excellent
  • Radiation Resistance: Fair – Good
  • Steam Resistance: Fair – Good
  • Sunlight Resistance: Good – Excellent
  • Taste Retention: Fair – Good
  • Weather Resistance: Fair – Good
  • Water Resistance: Fair – Good

Applications of Neoprene Rubber

Neoprene rubber is a versatile synthetic rubber often used in a wide variety of industries and applications:

  • Automotive: Transmission belts, brake and steering system components, vibration mounts
  • Construction: Window seals and gaskets, highway and bridge seals, washers
  • Music: Speaker Cones, Piano hammer tips
  • Home accessories: Laptop sleeves, remote controls, mouse pads
  • Civil Engineering
  • Aquatics
  • Mass Transit
  • Conveyer belts
  • Industrial hoses
  • O-rings
  • Diaphragms
  • Grommets

Qualiform ISO Certified Neoprene Rubber Manufacturer

Qualiform is an ISO-certified Neoprene manufacturer offering a wide range of custom rubber molding services. We also offer capabilities in molding standard OEM replacement stars as well as custom finger lengths and configurations. If you are looking to develop a recycling star for your Neoprene application or media processing, contact our expert technical staff for consultation on design and property requirements.

As a leader in Neoprene rubber manufacturing, we offer unmatched processing, development and testing capabilities. Our services include precision rubber molding, rubber compression moldingrubber injection moldingrubber transfer molding, and rubber to metal bonding. Additionally, our experience in the industry gives us incredible problem-solving capabilities for all areas of rubber molding and rubber-to-metal bonding. As a result, we are capable of creating custom solutions for any application.

Qualiform offers 40+ years of experience in rubber parts manufacturing, so customers can rely on us to create the high-quality Neoprene products they need. Contact the Qualiform technical staff at (330) 336-6777 to learn more about how we can help you.

Qualiform Proprietary Blend

Qualiform also offers a proprietary blend with reinforcing fibers for Neoprene. Our proprietary blend puts high-strength reinforcing fibers directly into the Neoprene, so the material has increased resistance against abrasions and impacts as well as improved durometer, toughness and performance. We also offer this blend for our other offered materials:

  • Butyl Rubber
  • EPDM Rubber
  • Natural Rubber
  • Nitrile Rubber
  • Rigid & Flexible Rubber
  • Synthetic Rubber
  • Thermoplastic Elastomers (TPE)
  • Viton Rubber
Factors Affecting Rubber Tolerances
Interested in Neoprene or Qualiform’s other rubber materials? Contact Qualiform today to receive expert material recommendations.