9 Common Rubber Types Full Analysis

In industrial manufacturing and rubber product production, common rubber types directly determine product service life, performance and cost! Many manufacturers suffer from wrong rubber selection: insufficient elasticity, oil resistance failure, rapid outdoor aging, and serious budget overruns. Today we will analyze 9 mainstream rubbers, explain their core properties, advantages, disadvantages and applicable scenarios, helping you quickly lock in the optimal material and make zero mistakes in material selection!

1. Natural Rubber: Basic General-Purpose Rubber with High Elasticity

Core Component: Natural polymer compound mainly composed of polyisoprene, extracted and processed from rubber trees, rubber grasses and other plants.

Core Advantages: Excellent elasticity and mechanical strength, the most basic rubber category.

Obvious Disadvantages: Poor oil resistance, insufficient stability in high-temperature environments.

Applicable Scenarios: Mild environments with less oil and moderate temperature, such as automobile tires and daily rubber gloves.

2. Styrene-Butadiene Rubber (SBR): Cost-Effective General-Purpose Synthetic Rubber

Core Component: Copolymer of butadiene and styrene, the most productive and widely used synthetic rubber.

Core Advantages: Excellent wear resistance, aging resistance, processability, affordable price, and can partially replace natural rubber.

Obvious Disadvantages: Overall elasticity is slightly inferior to natural rubber.

Applicable Scenarios: Conventional products sensitive to cost and requiring wear and heat resistance, such as industrial rubber rollers and mass-produced rubber accessories.

3. Neoprene (CR): All-Round Outdoor Weather-Resistant Rubber

Core Component: Polymerized from chloroprene.

Core Advantages: Excellent weather resistance, ozone resistance, chemical corrosion resistance and flame retardancy; oil resistance is second only to nitrile rubber, with good air tightness.

Obvious Disadvantages: Difficult to control processing viscosity, high requirements for production technology.

Applicable Scenarios: Products used outdoors for a long time, such as outdoor cable sheaths, building waterproof membranes, and seals.

4. Fluoroelastomer (FKM): Special Corrosion-Resistant Rubber for Extreme Working Conditions

Core Component: Synthetic rubber copolymerized from fluorine-containing monomers.

Core Advantages: Super resistance to strong acids, alkalis and organic solvents, long-term use at 200-250°C, excellent weather resistance and sealing performance.

Obvious Disadvantages: High price and difficult processing.

Applicable Scenarios: Extreme environments with strong corrosion in chemical industry, aviation and other fields, such as chemical seals and aviation sealing parts.

5. Silicone Rubber : Non-Toxic & Environmentally Friendly Rubber for High & Low Temperatures

Core Component: Synthetic rubber with siloxane bond as the main chain.

Core Advantages: Wide temperature resistance range (-60°C~250°C), non-toxic, environmentally friendly and good biocompatibility.

Obvious Disadvantages: Weak mechanical strength, needing to be used with reinforcing materials.

Applicable Scenarios: Food, medical and high-temperature electronic fields, such as food-grade seals, medical silicone tubes and oven seals.

6. Ethylene Propylene Diene Monomer (EPDM): Preferred Rubber for Weather-Resistant Sealing

Core Component: Copolymer of ethylene, propylene and a small amount of non-conjugated diene.

Core Advantages: Excellent chemical corrosion resistance, aging resistance, ozone resistance and electrical insulation; known as "the most widely used sealing rubber".

Obvious Disadvantages: Poor viscosity, requiring extra attention in bonding processing.

Applicable Scenarios: Outdoor sealing parts, such as automobile door and window seals, building curtain wall seals and waterproof membranes.

7. Butyl Rubber (IIR): Special Rubber with Ultra-High Air Tightness

Core Component: Copolymer of isobutylene and a small amount of isoprene.

Core Advantages: The highest air tightness among all rubbers, excellent damping performance and prominent shock absorption effect.

Obvious Disadvantages: Slow elastic recovery speed.

Applicable Scenarios: Products requiring air locking, liquid preservation and shock absorption, such as tire inner tubes, medical rubber stoppers and sound insulation shock absorbers.

8. Nitrile Butadiene Rubber (NBR): Special Rubber for Oil-Resistant Working Conditions

Core Component: Copolymer of butadiene and acrylonitrile.

Core Advantages: Top-tier oil resistance, strong tolerance to petroleum-based oils and non-polar solvents.

Obvious Disadvantages: Easy to harden and become brittle in low-temperature environments, poor cold resistance.

Applicable Scenarios: Mechanical parts contacting oil, such as engine oil seals, oil pipes and industrial seals.

9. Polyurethane Rubber (PU): All-Round Performer with Wear Resistance and High Elasticity

Core Component: Polymer synthetic material between rubber and plastic.

Core Advantages: 3-10 times more wear-resistant than natural rubber, combining high strength and high elasticity, oil and ozone resistant.

Obvious Disadvantages: Easy to hydrolyze at high temperatures, not suitable for long-term humid and hot environments.

Applicable Scenarios: Scenarios requiring high wear resistance and high elasticity, such as mining machinery liners, industrial casters and automobile suspension buffer blocks.

3 Core Rules for Rubber Selection

Clarify the service environment: temperature, contact medium, indoor/outdoor working conditions

Lock core requirements: elasticity, wear resistance, oil resistance, weather resistance, air tightness, etc.

Match cost budget: balance performance and procurement cost, reject blind material selection

What problems have you encountered in rubber selection? Welcome to leave a message to share your usage scenarios, and let’s find the optimal solution for material selection together!