Limitless Option Custom O Ring

Material

Abbr.

Hardness (Shore A)

Temp Range

Key Features

Advantages

Limitations

Typical Applications (Concise)

Nitrile Rubber

NBR

30–90

-40°C ~ +120°C

Oil/fuel resistance

Affordable, versatile.

Poor ozone/weather resistance.

Hydraulic systems, General machinery.

Styrene-Butadiene

SBR

40–80

-50°C ~ +100°C

Good resilience

Low cost, elasticity.

Poor oil/solvent resistance.

Non-petroleum brake fluid, Dampeners.

Natural Rubber

NR

30–80

-60°C ~ +80°C

Highest tensile strength

Excellent elasticity.

Poor heat resistance, zero oil resistance.

Shock mounts, Elastic gaskets.

Chloroprene

CR (Neoprene®)

50–80

-40°C ~ +100°C

Weather/refrigerant resistance

Good general-purpose.

Poor resistance to aromatic oils.

Refrigeration, Marine sealing.

Ethylene Propylene

EPDM

40–90

-50°C ~ +150°C

Weather/Water/Steam resistance

Excellent outdoor performance.

Poor oil/fuel resistance.

Plumbing, Brake fluid, HVAC systems.

EPDM Peroxide Cure

EPDM (P-Cure)

60–90

-50°C ~ +150°C

Higher thermal stability

Reliable for hot water/steam.

Poor oil/fuel resistance (same as std EPDM).

Automotive cooling, Steam applications.

Butyl Rubber

IIR

40–75

-40°C ~ +120°C

Excellent gas impermeability

Suitable for vacuum.

Poor resistance to petroleum oils/solvents.

Vacuum seals, Pharmaceutical stoppers.

Carboxylated Nitrile

XNBR

70–95

-30°C ~ +100°C

High abrasion resistance

Excellent for dynamic sealing.

Lower flexibility than NBR.

High-pressure seals, Industrial rollers.

Polyurethane

PU

60–95

-40°C ~ +85°C

Extreme mechanical strength

Preferred for high-pressure.

Poor resistance to hot water/steam (hydrolysis).

High-pressure hydraulic cylinders.

Hydrogenated Nitrile

HNBR

50–90

-40°C ~ +150°C

Heat/oil/high strength

Superior durability.

Higher cost than standard NBR.

Automotive A/C, Oilfield equipment.

Polyacrylate

ACM

50–80

-20°C ~ +150°C

Resistance to hot oil

Suits transmission fluids.

Poor low-temperature flexibility, poor water resistance.

Automotive transmissions, Engine seals.

Silicone

SI(VMQ)

5–90

-60°C ~ +230°C

Wide temp range, food-grade

Excellent high/low-temp.

Low mechanical strength, poor oil resistance.

Food/beverage, Medical devices.

Fluorosilicone

FSI (FVMQ)

40–80

-60°C ~ +180°C

Oil and low-temp resistance

Suitable for aerospace fuel.

Poor tear strength, high cost.

Aircraft fuel systems, Low-temp oil seals.

Fluorocarbon

FKM (Viton®)

50–90

-20°C ~ +250°C

Excellent heat/chemical/oil resistance

Suitable for corrosive fluids.

Higher cost, poor performance with hot water/steam.

High-temp auto engines, Chemical pumps/valves.

Polytetrafluoroethylene

PTFE (Teflon)

50-65D

-200°C ~ +260°C

Extreme chemical resistance

Non-Elastomer, resists most chemicals.

No elasticity (requires mechanical energizer).

Chemical equipment seals, Bearings.

Perfluoroelastomer

FFKM

60–90

-30°C ~ +320°C

Universal Chemical Resistance

Ultimate reliability in extreme heat.

Extremely high cost.

Chemical processing, Semiconductor.

Internally Lubricated

-

Varies

Varies

Contains internal lubricant

Reduces friction, aids assembly.

Higher formulation cost, lubricant may leach out over time.

Automated assembly lines, Pneumatic cylinders.

Thermoplastic Rubber

TPR

5A-85D

-50°C ~ +135°C

Combines plastic/rubber traits

Recyclable, easy to mold.

Limited temperature range and chemical resistance.

Consumer goods, Non-critical sealing.