Industrial Rubber Material Selection Guide: 16 Types, Properties & Applications

Introduction

Industrial rubber materials are fundamental components for sealing, transmission and vibration damping in manufacturing, automotive, metallurgy and hydraulic systems. This guide systematically covers 16 mainstream rubber elastomers, including their core properties, operating temperature ranges, advantages, limitations and typical industrial applications. Compiled by our in-house engineering team based on industry-standard material specifications, it serves as a practical reference for procurement engineers, maintenance technicians and product designers to select the most suitable rubber material for specific working conditions.

1. Overview of Rubber Categories & Performance Classification

Rubber material selection directly impacts equipment service life, operational reliability and maintenance costs. Based on functional characteristics and industrial use cases, mainstream rubber materials fall into three core categories:

• Special-performance rubber: Engineered for extreme conditions such as oil resistance, high temperature, chemical corrosion and vacuum environments, widely used in sealing components.

• General-purpose rubber: Balanced comprehensive performance with large production volume, mainly for tires, hoses, belts and general molded parts.

• Engineering rubber-plastic compounds: High strength, low friction and excellent wear resistance, designed for guide rings, support rings and wear components in hydraulic systems.

Among all materials listed in this guide, PTFE features the widest operating temperature range from -55°C to 260°C, while fluororubber and silicone rubber deliver the best long-term high-temperature stability around 200°C.

2. Special-Performance Rubber Types: Properties & Industrial Uses

Oil-resistant and high-temperature rubber materials are the most widely specified category in industrial sealing procurement. Below is a detailed breakdown of each mainstream type:

2.1 Nitrile Rubber (NBR)

Nitrile rubber (NBR) is a copolymer of butadiene and acrylonitrile, recognized as the most cost-effective oil-resistant elastomer for general hydraulic applications. It exhibits excellent resistance to gasoline and aliphatic hydrocarbon oils, outperforming all general-purpose rubbers and ranking only behind polysulfide, acrylate and fluororubber. It also delivers good heat resistance, air tightness, abrasion resistance, water resistance and strong adhesion.

Limitations: Not compatible with phosphate ester hydraulic fluids or gear oils with polar additives. Inferior cold resistance and ozone resistance compared to specialty elastomers.Operating temperature: -30°C to 100°C (long-term); up to 120°C for static sealing applicationsPrimary applications: O-rings, oil seals, oil-resistant hoses, gaskets for standard hydraulic and pneumatic systems

2.2 Hydrogenated Nitrile Rubber (HNBR)

Hydrogenated nitrile rubber (HNBR) is produced by fully or partially hydrogenating the double bonds in the butadiene segment of NBR. This modification significantly improves thermal stability, mechanical strength and abrasion resistance while retaining NBR’s outstanding oil resistance. When cross-linked with peroxide, its heat resistance clearly exceeds standard NBR.

Operating temperature: -30°C to 150°C (long-term)Primary applications: Reciprocating seals and rotary seals under high-temperature, high-speed operating conditions; automotive engine seals and oilfield equipment components

2.3 Fluororubber (FKM)

Fluororubber (FKM) is a high-performance organic elastomer copolymerized from fluorine-containing monomers. It delivers the best oil and chemical resistance among all commercial rubber materials, with a peak temperature resistance of 300°C. It also features excellent acid and alkali resistance, radiation resistance, high vacuum resistance, electrical insulation, mechanical strength and atmospheric aging resistance.

Compatibility: Suitable for all lubricating oils, gasoline, hydraulic oils and synthetic oils, including phosphate ester hydraulic fluids.Operating temperature: -20°C to 200°C (long-term)Primary applications: High-temperature and chemical-resistant seals, flame-resistant hydraulic system seals; widely used in metallurgy, power generation, aerospace and automotive powertrain systems

2.4 Silicone Rubber (Q)

Silicone rubber (Q) is a specialty elastomer with silicon and oxygen atoms in its main chain. It is widely recognized for its unmatched wide temperature range, maintaining elasticity from extreme cold to high heat. It also provides excellent electrical insulation, high thermal oxidation and ozone stability, and strong chemical inertness.

Limitations: Relatively low mechanical strength; poor resistance to oils, solvents, acids and alkalis.Operating temperature: -60°C to 200°C (long-term); up to 230°C for intermittent usePrimary applications: High and low temperature rotary seals, high-temperature wire and cable insulation; also approved for food and medical industries due to its non-toxic and odorless properties

2.5 Polyurethane Rubber (PU)

Polyurethane rubber (PU) is an elastomer polymerized from polyester or polyether and diisocyanate compounds. It stands out for having the best abrasion resistance of all rubber materials, paired with high tensile strength, good elasticity and excellent oil resistance. It also performs well in ozone resistance, aging resistance and air tightness.

Limitations: Limited temperature resistance; poor water and alkali resistance; not compatible with aromatic hydrocarbons, chlorinated hydrocarbons, ketones, esters and alcohols.Operating temperature: -30°C to 80°C (long-term)Primary applications: High-pressure, high-speed system seals in engineering machinery and metallurgical equipment; gaskets, vibration damping components and wear-resistant high-strength rubber parts

2.6 Ethylene Propylene Diene Monomer (EPDM)

EPDM rubber (ethylene propylene diene monomer) is a terpolymer of ethylene, propylene and a diene monomer. It has the best ozone resistance, UV resistance, weatherability and aging resistance among all general-purpose rubbers. It also features excellent electrical insulation, chemical resistance, impact elasticity and acid-alkali resistance, with low specific gravity that supports high filler loading.

Compatibility: Resistant to polar solvents such as ketones and esters, and compatible with Freon and various refrigerants. Not resistant to aliphatic and aromatic hydrocarbons; average oil resistance.Operating temperature: -50°C to 150°C (long-term)Primary applications: Refrigerator and refrigeration equipment seals; chemical equipment linings, wire and cable sheaths, steam hoses and automotive weatherstripping

3. General-Purpose Rubber Types: Properties & Applications

General-purpose synthetic rubber materials are the foundation of the rubber industry, featuring large output, wide availability and balanced performance for common industrial and consumer products.

3.1 Natural Rubber (NR)

Natural rubber (NR) consists primarily of polyisoprene, with small amounts of protein, moisture, resin acids, sugars and inorganic salts. It offers high elasticity, high tensile strength, excellent tear resistance and electrical insulation, good abrasion resistance and excellent processability with strong adhesion to other materials. Its overall performance surpasses most synthetic rubbers.

Limitations: Poor oxygen and ozone resistance leading to easy aging; low oil and solvent resistance; weak acid-alkali corrosion resistance; limited heat resistance.Operating temperature: -60°C to 80°CPrimary applications: Tires, rubber shoes, hoses, belts, wire and cable insulation; torsional vibration dampers, engine mounts, rubber-metal suspension elements, diaphragms and molded products

3.2 Styrene Butadiene Rubber (SBR)

Styrene butadiene rubber (SBR) is a copolymer of butadiene and styrene, and is the highest-volume general-purpose synthetic rubber globally. Its performance is close to natural rubber, with better abrasion resistance, aging resistance and heat resistance, and more uniform material consistency.

Limitations: Lower elasticity; inferior flex and tear resistance; poor processability, especially low self-adhesion and low green strength.Operating temperature: -50°C to 100°CPrimary applications: Substitute for natural rubber in tires, rubber sheets, hoses, rubber shoes and other general products

3.3 Butadiene Rubber (BR)

Butadiene rubber (BR) is a cis-structure rubber polymerized from butadiene. It features excellent elasticity, abrasion resistance, aging resistance and low-temperature performance, with low heat build-up under dynamic load and good adhesion to metals.

Limitations: Low tensile strength; poor tear resistance; inferior processability and self-adhesion.Operating temperature: -60°C to 100°CPrimary applications: Usually blended with natural rubber or SBR; mainly for tire treads, conveyor belts and special cold-resistant products

3.4 Other Common General-Purpose Rubbers

• Isoprene Rubber (IR): Known as synthetic natural rubber due to nearly identical chemical structure and performance to NR. Better aging resistance but slightly lower elasticity and higher cost. Used as a direct NR substitute.

• Chloroprene Rubber (CR): Contains chlorine atoms, providing excellent oxygen/ozone resistance, self-extinguishing flame resistance, oil resistance, solvent resistance and good physical mechanical properties. Used for cable sheaths, protective covers, chemical linings and flame-resistant rubber products.

• Butyl Rubber (IIR): Unmatched air tightness, good ozone/aging resistance and heat resistance (up to 130°C long-term), resistant to strong inorganic acids and general organic solvents. Mainly used for inner tubes, wire insulation and vibration damping products.

4. Engineering Rubber-Plastic Sealing Materials

Engineering plastic sealing materials provide high strength, low friction and outstanding wear resistance, serving as critical supporting components in hydraulic and pneumatic systems.

4.1 Polytetrafluoroethylene (PTFE)

Polytetrafluoroethylene (PTFE) is renowned for its exceptional chemical stability and wide temperature tolerance. It resists nearly all media including oils, water, steam and chemicals, with high mechanical strength, excellent wear resistance, extremely low friction coefficient and inherent self-lubricating properties.

Operating temperature: -55°C to 260°CPrimary applications: Wear rings, guide rings, backup rings and other common mechanical sealing components; widely used in metallurgy, petrochemicals, engineering machinery and light industry machinery

4.2 Nylon & Polyoxymethylene (POM)

• Nylon: Good oil, heat and abrasion resistance, high compressive strength and impact resistance, but lower dimensional stability. Operating temperature: -40°C to 120°C. Used for guide rings, support rings, pressure rings and backup rings.

• Polyoxymethylene (POM): Good oil, heat and abrasion resistance, high compressive strength and impact resistance, with self-lubricating properties and good dimensional stability but poor flex resistance. Operating temperature: -40°C to 140°C. Used for guide rings and backup rings.

4.3 Rubber-Plastic Compound

Rubber-plastic compound features high elastic modulus and high strength, with oil and heat performance similar to nitrile rubber.Operating temperature: -30°C to 80°CPrimary applications: O-rings, Y-rings, dust seals for engineering machinery and high-pressure hydraulic systems

5. Key Selection Criteria for Industrial Rubber Applications

Rubber material specification requires matching material properties to actual working conditions. The core factors to evaluate include:

1. Temperature range: Continuous and peak operating temperature

2. Media compatibility: Type of oil, chemical, solvent or refrigerant in contact

3. Mechanical load: Pressure, speed, compression and dynamic fatigue requirements

4. Environmental conditions: Ozone, UV, weathering and flame resistance needs

5. Cost-performance balance: Total lifecycle cost vs. initial material cost

Our technical team provides custom material recommendation and rubber part customization services based on specific application parameters.