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Perfluoroelastomers (FFKM, Kalrez®, Markez®, Chemraz®) deliver ultimate chemcial and high temperature resistance, but with a very high cost relative to traditional rubber elastomer sealing materials. Dozens of specialized formulations have been developed to maximize performance in specific application situations like improved low temperature, acid, amines, plasma, steam, food and medical grade, high pressure and explosive decompression resistance.
Fluorocarbon compounds are widely used in chemical, aerospace, and industrial applications. These materials offer excellent chemcial and high temperature resistance. Not recommended for use with steam, amines, or polar solvents. Specialty FKM types and formulations are available for improved low temperature and chemical resistance as well as colors, durometer hardness, food and medical grade, high pressure and explosive decompression resistance.
Aflas® materials exhibit excellent chemical, heat and steam resistance. They have similar properties to FKM, but with increased resistance to bases, amines, sour gasses, steam, and radiation. Aflas® materials can have limited compression set resistance and should not be used with aromatic fuels, ketones, or chlorinated hydrocarbons.
Nitrile rubber materials are the most commonly used general purpose o-ring material because of relative low cost, good mechanical properties, and performance with many basic oils, fuels, and lubricants. Not recommended for use with UV, ozone, steam, harsh fuels or chemicals. Nitrile materials can be formulated to enhance specific physical and chemical resistances like color, durometer hardness, internal lubrication, steam, ozone, high and low temperature performance.
Hydrogenated Nitrile was specifically developed to offer increased temperature and fuel resistance compared to traditional Nitrile (NBR) materials. HNBR compounds also have excellent abrasion, wear, and compression set resistance. Poor resistance to aromatic or chlorinated hydrocarbons, fuels and solvents.
Silicone materials have excellent thermal stability in extreme low and high temperature environments. Silicones have good broad spectrum chemical resistance and are physiologically neutral making them ideal for many food, pharma, and medical applications. Not recommended for dynamic service or for contact with many fuels, mineral oils, or concentrated acids. Silicone can be formulated in a variety colors, durometer hardnesses and variations designed for use in a wide range of demanding specialty applications like medical and EMI shielding.
Fluorosilicone materials are mechanically similar to Silicone (VMQ) but offer increased resistance to fuels and mineral oil at the cost of decreased high temperature resistance. Fluorosilicones have excellent low temperature resistance and are often used in demanding aerospace and automotive applications such as fuel and exhaust systems. Not recommended for dynamic service or for use with concentrated aromatic solvents, amines, esters, and ketones.
Ethylene-Propylene rubber materials are characterized by excellent chemical, steam and thermal resistance for a relative low cost. Often used in food, water, beverage and agricultural systems, hydraulic, braking, steam applications. Not recomended for use with oils and fuels. EP can be formulated in a variety of ways for use in a wide range of demanding specialty applications.
Polyurethane is a type of thermoplastic elastomer that can be formulated in a variety of ways, each yielding very different mechanical properties and resistances. Generally Polyurethanes have excellent wear and abrasion resistance, good weathering resistance, and moderate resistance to oils and lubricants depending on formulation. Not recommended for use in demanding chemical or thermal environments.
Popular Allorings Compounds
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Service Temperature Range
Resistances
Material Family Relative Price Low Temp. Range, °F Abbv. High Temp. Range, °F Compr. Set Oils Steam Weather/
UV
Fuels Acids/
Solvents
Bases Abrasion Wear Permeation
FFKM Perfluoro (Markez®, Kalrez®, etc) dollar sign 06 temperature range rating a rating a-plus rating s rating a rating a rating a-plus rating a-plus rating b rating s
FKM (Viton®) dollar sign 03 temperature range rating a rating a rating s rating a rating a rating a rating s rating b rating a
Aflas® dollar sign 04 temperature range rating b rating a rating a rating a rating b rating a rating a rating b rating a
Buna-N (NBR Nitrile) dollar sign 01 temperature range rating b rating a rating c rating c rating c rating c rating c rating b rating b
HNBR dollar sign 02 temperature range rating a rating a rating b rating a rating a rating b rating c rating a rating b
Silicone dollar sign 02 temperature range rating b rating c rating b rating a rating b rating c rating b rating c rating c
Fluorosilicone dollar sign 03 temperature range rating b rating b rating b rating a rating a rating a rating b rating c rating c
EPDM dollar sign 01 temperature range rating a rating c rating a rating a rating c rating b rating a rating b rating b
Polyurethane dollar sign 02 temperature range rating s rating s rating s rating s rating s rating c rating c rating a rating s
    temperature range chart
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  • Specialty Compounds Only
Compound Brand Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Special
Features
View Datasheet Markez®  dollar sign 2 Relative Availability: 4 5  610  75  Black 
Best value, high performance compound. Higher temperature resistance, wide chemical compatibility, excellent mechanical properties. Compare to Kalrez® 6375 and Kalrez® 4079. 
View Datasheet Markez®  dollar sign 2 Relative Availability: 3 5  500  75  Black 
Improved Acid, Amine and Steam resistance, compare to Kalrez® 6380 and Kalrez® 1050LF 
View Datasheet Markez®  dollar sign 2 Relative Availability: 3 -20  620  80  Black 
Higher and wider temperature range, general purpose, compare to Chemraz® 615 and Kalrez® 4079 
View Datasheet Markez®  dollar sign 3 Relative Availability: 3 5  500  75  White 
Medical Grade, USP Class VI, FDA, USDA 3A, Compare to Kalrez® 6221 
View Datasheet Markez®  dollar sign 3 Relative Availability: 3 -20  600  75  White 
Wider temperature range, higher purity, lower extractables, improved plasma resistance. compare to Kalrez®  
View Datasheet Chemraz®  dollar sign 3 Relative Availability: 2 -20  450  75  Black 
General purpose, not for use with steam or strong acids, compare to Markez® Z1028 and Z1205 
View Datasheet Kalrez®  dollar sign 4 Relative Availability: 2 -5  525  75  Black 
General purpose compound, compare to Markez® Z1028. 
View Datasheet Kalrez®  dollar sign 5 Relative Availability: 2 20  600  75  Black 
Higher temperature resistance compound. Not for use with steam. Compare to Markez® Z1028 and Z1213. 
View Datasheet Kalrez®  dollar sign 5 Relative Availability: 2 20  620  75  Black 
Improved high temperature and compression set resistance. Compare to Markez® Z1213 and Z1028. 
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Compound Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Special
Features
View Datasheet  dollar sign 3 Relative Availability: 5 -15  437  75  Black 
General purpose, commodity grade compound. 
View Datasheet  dollar sign 3 Relative Availability: 4 -15  437  75  Brown 
General purpose, commodity grade compound. 
View Datasheet  dollar sign 3 Relative Availability: 4 -15  437  90  Black 
Higher hardness for use in higher pressure applications. 
View Datasheet  dollar sign 5 Relative Availability: 3 -6  437  75  Black 
ETP type compound with greatly improved chemical resistance for use in harsh environments. 
View Datasheet  dollar sign 4 Relative Availability: 3 -40  437  75  Black 
GLT type compound with improved low temperature resistance. 
View Datasheet  dollar sign 4 Relative Availability: 2 -40  437  90  Black 
NORSOK NACE
GLT type compound with improved low temperature resistance, higher hardness, and Explosive Decompression (ED) resistance. Excellent for oilfiled and drilling applications. 
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Compound Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Special
Features
View Datasheet  dollar sign 4 Relative Availability: 2 15  450  80  Black 
General purpose, commodity grade compound. 
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Compound Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Special
Features
View Datasheet  dollar sign 1 Relative Availability: 5 -30  250  70  Black 
General purpose, commodity grade compound. 
View Datasheet  dollar sign 2 Relative Availability: 4 -30  250  90  Black 
Higher hardness for use in higher pressure applications. 
View Datasheet  dollar sign 3 Relative Availability: 3 -30  250  70  Black 
FDA
Food contact grade compound. FDA compliant. 
 dollar sign 3 Relative Availability: 2 -30  250  50  Black 
Softer hardness to seal rough or warped glands and or low closure force applications. 
 dollar sign 3 Relative Availability: 1 -65  250  70  Black 
Improved lower temperature resistance 
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Compound Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Special
Features
View Datasheet  dollar sign 2 Relative Availability: 3 -30  325  70  Green 
General purpose, commodity grade compound. 
View Datasheet  dollar sign 2 Relative Availability: 3 -30  325  70  Black 
General purpose, commodity grade compound. 
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Compound Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Cure System Special
Features
View Datasheet  dollar sign 2 Relative Availability: 5 -75  400  70  Orange  Peroxide 
FDA
Food and beverage grade compound. FDA compliant. 
 dollar sign 3 Relative Availability: 2 -75  400  50  Orange  Peroxide 
Softer hardness to seal rough or warped glands and or low closure force applications. 
 dollar sign 4 Relative Availability: 1 -65  500  70  Orange  Peroxide 
Improved high temperature resistance compound. 
View Datasheet  dollar sign 6 Relative Availability: 2 -65  400  70  Clear-Translucent  Platinum 
FDA USP
Ultra clean compound for use in medical and pharmaceutical applications. Manufactured and packaged in a clean room. 
 dollar sign 4 Relative Availability: 2 -100  400  50  Orange  Peroxide 
Improved low temperature resistance compound. 
 dollar sign 4 Relative Availability: 2 -65  400  70  Clear-Translucent  Platinum 
FDA USP
Medical and pharmaceutical grade compound. NOT manufactured or packaged in a clean room. For clean room MFG, see S1037. 
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Compound Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Special
Features
View Datasheet  dollar sign 3 Relative Availability: 3 -80  350  70  Blue 
Compatibile with most jet and auto fuels. Formulated to meet Military and Aerospace specifications. 
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Compound Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Cure System Special
Features
View Datasheet  dollar sign 3 Relative Availability: 4 -65  300  70  Black  Peroxide 
FDA NSF61
Food, beverage, and drinking water grade compound. FDA and NSF-61 compliant. 
View Datasheet  dollar sign 1 Relative Availability: 5 -65  300  70  Black  Peroxide 
General Purpose, commodity grade compound. 
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Compound Relative
Price
Relative
Availability
Low Temp ° F High Temp ° F Durometer Color Base Polymer Material Type/Cure Special
Features
View Datasheet  dollar sign 4 Relative Availability: 3 -65  250  70  Yellow-Translucent  Polyester  Cast, TODI Performance Cure 
Greatly increased mechanical properties and wear resistance. 
View Datasheet  dollar sign 4 Relative Availability: 3 -65  250  90  Yellow-Translucent  Polyester  Cast, TODI Performance Cure 
Higher hardness and extrusion resistance for use in higher pressure applications. Greatly increased mechanical properties and wear resistance. 
View Datasheet  dollar sign 2 Relative Availability: 3 -30  180  90  Yellow-Translucent  Polyether  Millable Gum 
Higher hardness, general purpose compound. 
View Datasheet  dollar sign 2 Relative Availability: 4 -30  180  70  Yellow-Translucent  Polyether  Millable Gum 
General purpose compound. Not for use in higher pressure applications. 
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