Much like our premium Pneumatic Seals, K.O.K. O-rings are manufactured in a meticulous environment with the highest quality materials and process to ensure your O-Rings keep air and gas in, and everything else out.

Before production, the K.O.K. engineering team will understand the specifications of your O-Ring needs. Then, we will provide options for the best materials to use.

K.O.K. O-Ring seals are fabricated with our proprietary high quality polymeric materials. They are extremely effective in preventing leakage.

KOK has the capability to check 100% of O-rings coming off lines, utilizing our Basler Inspection Machines, ensuring the absolute highest quality product for you.

Our O-Rings are used by Manufacturers in the following markets:

  • Aerospace
  • Automotive
  • Motorcycle
  • Agricultural
  • Industrial equipment
  • Food processing 
  • Energy
  • Electronics
K.O.K.’s Best Quality O-Ring Materials See K.O.K.’s Top O-Ring Types
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O-Rings and Static Seals Materials

K.O.K. Top Performing Sealing Ring Materials

K.O.K. invests a great amount of time and money into developing o-ring materials that meet our customers’ meticulous expectations. K.O.K’s expertise is in developing these proprietary solutions that improve the longevity and performance of our customers’ products.

After understanding your project and design goals, our team will guide you to selecting the O-ring material best suited for your needs. 

Before producing your O-Rings, we will look at the following requirements:

  • Min/Max Temperature Range
  • Min/Max Strength and Compression
  • Environmental Exposure Resistance
  • Chemical & Flame Resistance
  • Water Resistance
  • And more…
Types of Oil Seals

Our compounds are proprietary mixtures of elastomers and other ingredients, including:

  • Polymers
  • Reinforcing Agents
  • Curing or Vulcanizing Agents
  • Plasticizers
  • Accelerator
  • Anti-oxidants
  • Anti-ozonants
  • Anti-rads 

 

See the types of O-Ring rubber, polymeric and other materials K.O.K. can produce for your specifications below.

Nitrile (NBR, Buna N)

Min/Max Temperature Range:  -35℃ ~ +120℃

Min/Max Strength & Compression: 100 & 25

Environmental Exposure Resistance: normal

Chemical & Flame Resistance: good  & normal

Water Resistance: good

Fluorocarbon (FKM)

Min/Max Temperature Range:  -20℃ ~ +250℃

Min/Max Strength & Compression: 100 & 50

Environmental Exposure Resistance: excellent

Chemical & Flame Resistance: excellent & excellent

Water Resistance: good

Fluorosilicone (FVMQ)

Min/Max Temperature Range:  -55℃ ~ +225℃

Min/Max Strength & Compression: 60 & 50

Environmental Exposure Resistance: excellent

Chemical & Flame Resistance: excellent & good

Water Resistance: excellent

Neoprene (CR)

Min/Max Temperature Range:  -40℃ ~ +100℃

Min/Max Strength & Compression: 100 & 35

Environmental Exposure Resistance: excellent

Chemical & Flame Resistance: normal & good

Water Resistance: good

Ployacrylic Rubber (ACM)

Min/Max Temperature Range:  -20℃ ~ +150℃

Min/Max Strength & Compression: 80 & 50

Environmental Exposure Resistance: excellent

Chemical & Flame Resistance: good & normal 

Water Resistance: not recommended

Silicone (VMQ)

Min/Max Temperature Range:  -60℃ ~ +230℃

Min/Max Strength & Compression: 60 & 25

Environmental Exposure Resistance: excellent

Chemical & Flame Resistance: excellent & normal

Water Resistance: excellent

Hydrogenated Nitrile Rubber (HNBR)

Min/Max Temperature Range:  -40℃ ~ +150℃

Min/Max Strength & Compression:100 & 50

Environmental Exposure Resistance: good

Chemical & Flame Resistance: good & normal

Water Resistance: excellent

Ethylene Propylene (EPM, EPDM)

Min/Max Temperature Range:  -40℃ ~ +125℃

Min/Max Strength & Compression: 100 & 35

Environmental Exposure Resistance: excellent

Chemical & Flame Resistance: good & good

Water Resistance: excellent

Polyurethane (AU, EU)

Min/Max Temperature Range:  -45℃ ~ +90℃

Min/Max Strength & Compression: 180 & 35

Environmental Exposure Resistance: not recommended

Chemical & Flame Resistance: not recommended & not recommended

Water Resistance: not recommended

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