Kalrez Rubber | McMaster-Carr

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Kalrez

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387 Products

About O-Rings

Chemical-Resistant Ultra-High
Temperature Kalrez Rubber Sheets

Even when temperatures rise to 445° F, these Kalrez sheets are resistant to virtually all classes of chemicals.

Chemical-Resistant Ultra-High
Temperature FFKM Rubber Balls

For use in harsh environments, these FFKM balls resist most chemicals and withstand temperatures up to 445° F.

Chemical-Resistant O-Rings

Ultra-Chemical-Resistant Kalrez 4079 O-Rings

Inherently softer and more compressible than PTFE O-rings, these Kalrez 4079 O-rings have comparable chemical resistance.

Ultra-Chemical-Resistant DuPont Kalrez 4079
O-Rings for Straight-Thread Connections

Also known as Boss O-rings, these O-rings are made for tube fittings with a straight-thread connection. Made of Kalrez 4079, they combine the chemical resistance of PTFE with the springy softness of Viton® fluoroelastomer.

High-Purity Ultra-Chemical-Resistant
DuPont Kalrez 6230 O-Rings

Create seals for use in semiconductor manufacturing, food processing, and other highly controlled applications. More pure than Kalrez 4079 O-rings, these Kalrez 6230 O-rings won’t leach contaminants into your line.

Super-Resilient Ultra-Chemical-Resistant
DuPont Kalrez 7075 O-Rings

Made for demanding applications, these Kalrez 7075 O-rings hold their shape even after repeated rubbing or compression. More durable than Kalrez 4079 O-rings, they also have higher tensile strength and heat resistance.

Steam- and Ultra-Chemical-Resistant
DuPont Kalrez 6375 O-Rings

Able to withstand the widest range of chemicals of any Kalrez O-ring, these Kalrez 6375 O-rings are often used for chemical processing and applications involving steam.

Ultra-Chemical-Resistant FFKM 4079
O-Rings for Straight-Thread Connections

The same chemical and heat resistance as Kalrez 4079 without the brand name. Also known as boss O-rings, these O-rings are sized to fit straight-thread fittings to prevent leaks.

Ultra-Chemical-Resistant FFKM 4079 O-Rings

Get the same chemical and heat resistance as Kalrez 4079 without the brand name. Even at 600° F, these FFKM O-rings resist a wide range of chemicals, including acetone, methyl ethyl ketone (MEK), potassium hydroxide, and most acids.

About O-Rings

Chemical-Resistant Rubber

Chemical-Resistant Ultra-HighTemperature Kalrez Rubber Sheets

Chemical-Resistant Ultra-HighTemperature FFKM Rubber Balls

Chemical-Resistant O-Rings

Ultra-Chemical-Resistant Kalrez 4079 O-Rings

Ultra-Chemical-Resistant DuPont Kalrez 4079O-Rings for Straight-Thread Connections

High-Purity Ultra-Chemical-ResistantDuPont Kalrez 6230 O-Rings

Super-Resilient Ultra-Chemical-ResistantDuPont Kalrez 7075 O-Rings

Steam- and Ultra-Chemical-ResistantDuPont Kalrez 6375 O-Rings

Ultra-Chemical-Resistant FFKM 4079O-Rings for Straight-Thread Connections

Ultra-Chemical-Resistant FFKM 4079 O-Rings

Chemical-Resistant Ultra-High
Temperature Kalrez Rubber Sheets

Chemical-Resistant Ultra-High
Temperature FFKM Rubber Balls

Ultra-Chemical-Resistant DuPont Kalrez 4079
O-Rings for Straight-Thread Connections

High-Purity Ultra-Chemical-Resistant
DuPont Kalrez 6230 O-Rings

Super-Resilient Ultra-Chemical-Resistant
DuPont Kalrez 7075 O-Rings

Steam- and Ultra-Chemical-Resistant
DuPont Kalrez 6375 O-Rings

Ultra-Chemical-Resistant FFKM 4079
O-Rings for Straight-Thread Connections